diff --git a/searx/static/themes/oscar/src/js/plugins/infinite_scroll.js b/searx/static/themes/oscar/src/js/plugins/infinite_scroll.js
index f3b3767ff..3065d17c9 100644
--- a/searx/static/themes/oscar/src/js/plugins/infinite_scroll.js
+++ b/searx/static/themes/oscar/src/js/plugins/infinite_scroll.js
@@ -1,66 +1,66 @@
 if (searxng.plugins['searx.plugins.infinite_scroll']) {
-function hasScrollbar() {
-    var root = document.compatMode=='BackCompat'? document.body : document.documentElement;
-    return root.scrollHeight>root.clientHeight;
-}
+    function hasScrollbar() {
+        var root = document.compatMode=='BackCompat'? document.body : document.documentElement;
+        return root.scrollHeight>root.clientHeight;
+    }
 
-function loadNextPage() {
-    var formData = $('#pagination form:last').serialize();
-    if (formData) {
-        $('#pagination').html('<div class="loading-spinner"></div>');
-        $.ajax({
-            type: "POST",
-            url: $('#search_form').prop('action'),
-            data: formData,
-            dataType: 'html',
-            success: function(data) {
-                var body = $(data);
-                $('#pagination').remove();
-                $('#main_results').append('<hr/>');
-                $('#main_results').append(body.find('.result'));
-                $('#main_results').append(body.find('#pagination'));
-                if(!hasScrollbar()) {
-                    loadNextPage();
+    function loadNextPage() {
+        var formData = $('#pagination form:last').serialize();
+        if (formData) {
+            $('#pagination').html('<div class="loading-spinner"></div>');
+            $.ajax({
+                type: "POST",
+                url: $('#search_form').prop('action'),
+                data: formData,
+                dataType: 'html',
+                success: function(data) {
+                    var body = $(data);
+                    $('#pagination').remove();
+                    $('#main_results').append('<hr/>');
+                    $('#main_results').append(body.find('.result'));
+                    $('#main_results').append(body.find('#pagination'));
+                    if(!hasScrollbar()) {
+                        loadNextPage();
+                    }
                 }
-            }
-        });
+            });
+        }
     }
-}
 
-$(document).ready(function() {
-    var win = $(window);
-    if(!hasScrollbar()) {
-        loadNextPage();
-    }
-    win.scroll(function() {
-        $("#pagination button").css("visibility", "hidden");
-        if ($(document).height() - win.height() - win.scrollTop() < 150) {
+    $(document).ready(function() {
+        var win = $(window);
+        if(!hasScrollbar()) {
             loadNextPage();
         }
+        win.scroll(function() {
+            $("#pagination button").css("visibility", "hidden");
+            if ($(document).height() - win.height() - win.scrollTop() < 150) {
+                loadNextPage();
+            }
+        });
     });
-});
 
-const style = document.createElement('style');
-style.textContent = `
-@keyframes rotate-forever {
-    0%   { transform: rotate(0deg) }
-    100% { transform: rotate(360deg) }
-}
-.loading-spinner {
-    animation-duration: 0.75s;
-    animation-iteration-count: infinite;
-    animation-name: rotate-forever;
-    animation-timing-function: linear;
-    height: 30px;
-    width: 30px;
-    border: 8px solid #666;
-    border-right-color: transparent;
-    border-radius: 50% !important;
-    margin: 0 auto;
-}
-#pagination button {
-	visibility: hidden;
-}
-`;
-document.head.append(style);
+    const style = document.createElement('style');
+    style.textContent = `
+    @keyframes rotate-forever {
+        0%   { transform: rotate(0deg) }
+        100% { transform: rotate(360deg) }
+    }
+    .loading-spinner {
+        animation-duration: 0.75s;
+        animation-iteration-count: infinite;
+        animation-name: rotate-forever;
+        animation-timing-function: linear;
+        height: 30px;
+        width: 30px;
+        border: 8px solid #666;
+        border-right-color: transparent;
+        border-radius: 50% !important;
+        margin: 0 auto;
+    }
+    #pagination button {
+        visibility: hidden;
+    }
+    `;
+    document.head.append(style);
 }
diff --git a/searx/static/themes/oscar/src/js/plugins/search_on_category_select.js b/searx/static/themes/oscar/src/js/plugins/search_on_category_select.js
index 80876606a..c270b8c11 100644
--- a/searx/static/themes/oscar/src/js/plugins/search_on_category_select.js
+++ b/searx/static/themes/oscar/src/js/plugins/search_on_category_select.js
@@ -1,44 +1,44 @@
 if (searxng.plugins['searx.plugins.search_on_category_select']) {
-$(document).ready(function() {
-    if($('#q').length) {
-        $('#categories label').click(function(e) {
-            $('#categories input[type="checkbox"]').each(function(i, checkbox) {
-                $(checkbox).prop('checked', false);
+    $(document).ready(function() {
+        if($('#q').length) {
+            $('#categories label').click(function(e) {
+                $('#categories input[type="checkbox"]').each(function(i, checkbox) {
+                    $(checkbox).prop('checked', false);
+                });
+                $(document.getElementById($(this).attr("for"))).prop('checked', true);
+                if($('#q').val()) {
+                    if (getHttpRequest() == "GET") {
+                        $('#search_form').attr('action', $('#search_form').serialize());
+                    }
+                    $('#search_form').submit();
+                }
+                return false;
             });
-            $(document.getElementById($(this).attr("for"))).prop('checked', true);
-            if($('#q').val()) {
-                if (getHttpRequest() == "GET") {
-                    $('#search_form').attr('action', $('#search_form').serialize());
+            $('#time-range').change(function(e) {
+                if($('#q').val()) {
+                    if (getHttpRequest() == "GET") {
+                        $('#search_form').attr('action', $('#search_form').serialize());
+                    }
+                    $('#search_form').submit();
                 }
-                $('#search_form').submit();
-            }
-            return false;
-        });
-        $('#time-range').change(function(e) {
-            if($('#q').val()) {
-                if (getHttpRequest() == "GET") {
-                    $('#search_form').attr('action', $('#search_form').serialize());
+            });
+            $('#language').change(function(e) {
+                if($('#q').val()) {
+                    if (getHttpRequest() == "GET") {
+                        $('#search_form').attr('action', $('#search_form').serialize());
+                    }
+                    $('#search_form').submit();
                 }
-                $('#search_form').submit();
-            }
-        });
-        $('#language').change(function(e) {
-            if($('#q').val()) {
-                if (getHttpRequest() == "GET") {
-                    $('#search_form').attr('action', $('#search_form').serialize());
-                }
-                $('#search_form').submit();
-            }
-        });
-    }
-});
+            });
+        }
+    });
 
-function getHttpRequest() {
-    httpRequest = "POST";
-    urlParams = new URLSearchParams(window.location.search);
-    if (urlParams.has('method')) {
-        httpRequest = urlParams.get('method');
+    function getHttpRequest() {
+        httpRequest = "POST";
+        urlParams = new URLSearchParams(window.location.search);
+        if (urlParams.has('method')) {
+            httpRequest = urlParams.get('method');
+        }
+        return httpRequest;
     }
-    return httpRequest;
-}
 }
diff --git a/searx/static/themes/oscar/src/js/plugins/vim_hotkeys.js b/searx/static/themes/oscar/src/js/plugins/vim_hotkeys.js
index 56b921ffa..35f351591 100644
--- a/searx/static/themes/oscar/src/js/plugins/vim_hotkeys.js
+++ b/searx/static/themes/oscar/src/js/plugins/vim_hotkeys.js
@@ -1,378 +1,378 @@
 if (searxng.plugins['searx.plugins.vim_hotkeys']) {
-$(document).ready(function() {
-    highlightResult('top')();
+    $(document).ready(function() {
+        highlightResult('top')();
 
-    $('.result').on('click', function() {
-        highlightResult($(this))();
-    });
-
-    var vimKeys = {
-        27: {
-            key: 'Escape',
-            fun: removeFocus,
-            des: 'remove focus from the focused input',
-            cat: 'Control'
-        },
-        73: {
-            key: 'i',
-            fun: searchInputFocus,
-            des: 'focus on the search input',
-            cat: 'Control'
-        },
-        66: {
-            key: 'b',
-            fun: scrollPage(-window.innerHeight),
-            des: 'scroll one page up',
-            cat: 'Navigation'
-        },
-        70: {
-            key: 'f',
-            fun: scrollPage(window.innerHeight),
-            des: 'scroll one page down',
-            cat: 'Navigation'
-        },
-        85: {
-            key: 'u',
-            fun: scrollPage(-window.innerHeight / 2),
-            des: 'scroll half a page up',
-            cat: 'Navigation'
-        },
-        68: {
-            key: 'd',
-            fun: scrollPage(window.innerHeight / 2),
-            des: 'scroll half a page down',
-            cat: 'Navigation'
-        },
-        71: {
-            key: 'g',
-            fun: scrollPageTo(-document.body.scrollHeight, 'top'),
-            des: 'scroll to the top of the page',
-            cat: 'Navigation'
-        },
-        86: {
-            key: 'v',
-            fun: scrollPageTo(document.body.scrollHeight, 'bottom'),
-            des: 'scroll to the bottom of the page',
-            cat: 'Navigation'
-        },
-        75: {
-            key: 'k',
-            fun: highlightResult('up'),
-            des: 'select previous search result',
-            cat: 'Results'
-        },
-        74: {
-            key: 'j',
-            fun: highlightResult('down'),
-            des: 'select next search result',
-            cat: 'Results'
-        },
-        80: {
-            key: 'p',
-            fun: pageButtonClick(0),
-            des: 'go to previous page',
-            cat: 'Results'
-        },
-        78: {
-            key: 'n',
-            fun: pageButtonClick(1),
-            des: 'go to next page',
-            cat: 'Results'
-        },
-        79: {
-            key: 'o',
-            fun: openResult(false),
-            des: 'open search result',
-            cat: 'Results'
-        },
-        84: {
-            key: 't',
-            fun: openResult(true),
-            des: 'open the result in a new tab',
-            cat: 'Results'
-        },
-        82: {
-            key: 'r',
-            fun: reloadPage,
-            des: 'reload page from the server',
-            cat: 'Control'
-        },
-        72: {
-            key: 'h',
-            fun: toggleHelp,
-            des: 'toggle help window',
-            cat: 'Other'
-        }
-    };
-
-    $(document).keydown(function(e) {
-        // check for modifiers so we don't break browser's hotkeys
-        if (vimKeys.hasOwnProperty(e.keyCode)
-            && !e.ctrlKey
-            && !e.altKey
-            && !e.shiftKey
-            && !e.metaKey)
-        {
-            if (e.keyCode === 27) {
-                if (e.target.tagName.toLowerCase() === 'input') {
-                    vimKeys[e.keyCode].fun();
-                }
-            } else {
-                if (e.target === document.body) {
-                    e.preventDefault();
-                    vimKeys[e.keyCode].fun();
-                }
-            }
-        }
-    });
-
-    function nextResult(current, direction) {
-        var next = current[direction]();
-        while (!next.is('.result') && next.length !== 0) {
-            next = next[direction]();
-        }
-        return next
-    }
-
-    function highlightResult(which) {
-        return function() {
-            var current = $('.result[data-vim-selected]');
-            if (current.length === 0) {
-                current = $('.result:first');
-                if (current.length === 0) {
-                    return;
-                }
-            }
-
-            var next;
-
-            if (typeof which !== 'string') {
-                next = which;
-            } else {
-                switch (which) {
-                    case 'visible':
-                        var top = $(window).scrollTop();
-                        var bot = top + $(window).height();
-                        var results = $('.result');
-
-                        for (var i = 0; i < results.length; i++) {
-                            next = $(results[i]);
-                            var etop = next.offset().top;
-                            var ebot = etop + next.height();
-
-                            if ((ebot <= bot) && (etop > top)) {
-                                break;
-                            }
-                        }
-                        break;
-                    case 'down':
-                        next = nextResult(current, 'next');
-                        if (next.length === 0) {
-                            next = $('.result:first');
-                        }
-                        break;
-                    case 'up':
-                        next = nextResult(current, 'prev');
-                        if (next.length === 0) {
-                            next = $('.result:last');
-                        }
-                        break;
-                    case 'bottom':
-                        next = $('.result:last');
-                        break;
-                    case 'top':
-                    default:
-                        next = $('.result:first');
-                }
-            }
-
-            if (next) {
-                current.removeAttr('data-vim-selected').removeClass('well well-sm');
-                next.attr('data-vim-selected', 'true').addClass('well well-sm');
-                scrollPageToSelected();
-            }
-        }
-    }
-
-    function reloadPage() {
-        document.location.reload(false);
-    }
-
-    function removeFocus() {
-        if (document.activeElement) {
-            document.activeElement.blur();
-        }
-    }
-
-    function pageButtonClick(num) {
-        return function() {
-            var buttons = $('div#pagination button[type="submit"]');
-            if (buttons.length !== 2) {
-                console.log('page navigation with this theme is not supported');
-                return;
-            }
-            if (num >= 0 && num < buttons.length) {
-                buttons[num].click();
-            } else {
-                console.log('pageButtonClick(): invalid argument');
-            }
-        }
-    }
-
-    function scrollPageToSelected() {
-        var sel = $('.result[data-vim-selected]');
-        if (sel.length !== 1) {
-            return;
-        }
-
-        var wnd = $(window);
-
-        var wtop = wnd.scrollTop();
-        var etop = sel.offset().top;
-
-        var offset = 30;
-
-        if (wtop > etop) {
-            wnd.scrollTop(etop - offset);
-        } else  {
-            var ebot = etop + sel.height();
-            var wbot = wtop + wnd.height();
-
-            if (wbot < ebot) {
-                wnd.scrollTop(ebot - wnd.height() + offset);
-            }
-        }
-    }
-
-    function scrollPage(amount) {
-        return function() {
-            window.scrollBy(0, amount);
-            highlightResult('visible')();
-        }
-    }
-
-    function scrollPageTo(position, nav) {
-        return function() {
-            window.scrollTo(0, position);
-            highlightResult(nav)();
-        }
-    }
-
-    function searchInputFocus() {
-        $('input#q').focus();
-    }
-
-    function openResult(newTab) {
-        return function() {
-            var link = $('.result[data-vim-selected] .result_header a');
-            if (link.length) {
-                var url = link.attr('href');
-                if (newTab) {
-                    window.open(url);
-                } else {
-                    window.location.href = url;
-                }
-            }
-        };
-    }
-
-    function toggleHelp() {
-        var helpPanel = $('#vim-hotkeys-help');
-        if (helpPanel.length) {
-            helpPanel.toggleClass('hidden');
-            return;
-        }
-
-        var categories = {};
-
-        for (var k in vimKeys) {
-            var key = vimKeys[k];
-            categories[key.cat] = categories[key.cat] || [];
-            categories[key.cat].push(key);
-        }
-
-        var sorted = Object.keys(categories).sort(function(a, b) {
-            return categories[b].length - categories[a].length;
+        $('.result').on('click', function() {
+            highlightResult($(this))();
         });
 
-        if (sorted.length === 0) {
-            return;
+        var vimKeys = {
+            27: {
+                key: 'Escape',
+                fun: removeFocus,
+                des: 'remove focus from the focused input',
+                cat: 'Control'
+            },
+            73: {
+                key: 'i',
+                fun: searchInputFocus,
+                des: 'focus on the search input',
+                cat: 'Control'
+            },
+            66: {
+                key: 'b',
+                fun: scrollPage(-window.innerHeight),
+                des: 'scroll one page up',
+                cat: 'Navigation'
+            },
+            70: {
+                key: 'f',
+                fun: scrollPage(window.innerHeight),
+                des: 'scroll one page down',
+                cat: 'Navigation'
+            },
+            85: {
+                key: 'u',
+                fun: scrollPage(-window.innerHeight / 2),
+                des: 'scroll half a page up',
+                cat: 'Navigation'
+            },
+            68: {
+                key: 'd',
+                fun: scrollPage(window.innerHeight / 2),
+                des: 'scroll half a page down',
+                cat: 'Navigation'
+            },
+            71: {
+                key: 'g',
+                fun: scrollPageTo(-document.body.scrollHeight, 'top'),
+                des: 'scroll to the top of the page',
+                cat: 'Navigation'
+            },
+            86: {
+                key: 'v',
+                fun: scrollPageTo(document.body.scrollHeight, 'bottom'),
+                des: 'scroll to the bottom of the page',
+                cat: 'Navigation'
+            },
+            75: {
+                key: 'k',
+                fun: highlightResult('up'),
+                des: 'select previous search result',
+                cat: 'Results'
+            },
+            74: {
+                key: 'j',
+                fun: highlightResult('down'),
+                des: 'select next search result',
+                cat: 'Results'
+            },
+            80: {
+                key: 'p',
+                fun: pageButtonClick(0),
+                des: 'go to previous page',
+                cat: 'Results'
+            },
+            78: {
+                key: 'n',
+                fun: pageButtonClick(1),
+                des: 'go to next page',
+                cat: 'Results'
+            },
+            79: {
+                key: 'o',
+                fun: openResult(false),
+                des: 'open search result',
+                cat: 'Results'
+            },
+            84: {
+                key: 't',
+                fun: openResult(true),
+                des: 'open the result in a new tab',
+                cat: 'Results'
+            },
+            82: {
+                key: 'r',
+                fun: reloadPage,
+                des: 'reload page from the server',
+                cat: 'Control'
+            },
+            72: {
+                key: 'h',
+                fun: toggleHelp,
+                des: 'toggle help window',
+                cat: 'Other'
+            }
+        };
+
+        $(document).keydown(function(e) {
+            // check for modifiers so we don't break browser's hotkeys
+            if (vimKeys.hasOwnProperty(e.keyCode)
+                && !e.ctrlKey
+                && !e.altKey
+                && !e.shiftKey
+                && !e.metaKey)
+            {
+                if (e.keyCode === 27) {
+                    if (e.target.tagName.toLowerCase() === 'input') {
+                        vimKeys[e.keyCode].fun();
+                    }
+                } else {
+                    if (e.target === document.body) {
+                        e.preventDefault();
+                        vimKeys[e.keyCode].fun();
+                    }
+                }
+            }
+        });
+
+        function nextResult(current, direction) {
+            var next = current[direction]();
+            while (!next.is('.result') && next.length !== 0) {
+                next = next[direction]();
+            }
+            return next
         }
 
-        var html = '<div id="vim-hotkeys-help" class="well vim-hotkeys-help">';
-        html += '<div class="container-fluid">';
+        function highlightResult(which) {
+            return function() {
+                var current = $('.result[data-vim-selected]');
+                if (current.length === 0) {
+                    current = $('.result:first');
+                    if (current.length === 0) {
+                        return;
+                    }
+                }
 
-        html += '<div class="row">';
-        html += '<div class="col-sm-12">';
-        html += '<h3>How to navigate searx with Vim-like hotkeys</h3>';
-        html += '</div>'; // col-sm-12
-        html += '</div>'; // row
+                var next;
 
-        for (var i = 0; i < sorted.length; i++) {
-            var cat = categories[sorted[i]];
+                if (typeof which !== 'string') {
+                    next = which;
+                } else {
+                    switch (which) {
+                        case 'visible':
+                            var top = $(window).scrollTop();
+                            var bot = top + $(window).height();
+                            var results = $('.result');
 
-            var lastCategory = i === (sorted.length - 1);
-            var first = i % 2 === 0;
+                            for (var i = 0; i < results.length; i++) {
+                                next = $(results[i]);
+                                var etop = next.offset().top;
+                                var ebot = etop + next.height();
 
-            if (first) {
-                html += '<div class="row dflex">';
-            }
-            html += '<div class="col-sm-' + (first && lastCategory ? 12 : 6) + ' dflex">';
+                                if ((ebot <= bot) && (etop > top)) {
+                                    break;
+                                }
+                            }
+                            break;
+                        case 'down':
+                            next = nextResult(current, 'next');
+                            if (next.length === 0) {
+                                next = $('.result:first');
+                            }
+                            break;
+                        case 'up':
+                            next = nextResult(current, 'prev');
+                            if (next.length === 0) {
+                                next = $('.result:last');
+                            }
+                            break;
+                        case 'bottom':
+                            next = $('.result:last');
+                            break;
+                        case 'top':
+                        default:
+                            next = $('.result:first');
+                    }
+                }
 
-            html += '<div class="panel panel-default iflex">';
-            html += '<div class="panel-heading">' + cat[0].cat + '</div>';
-            html += '<div class="panel-body">';
-            html += '<ul class="list-unstyled">';
-
-            for (var cj in cat) {
-                html += '<li><kbd>' + cat[cj].key + '</kbd> ' + cat[cj].des + '</li>';
-            }
-
-            html += '</ul>';
-            html += '</div>'; // panel-body
-            html += '</div>'; // panel
-            html += '</div>'; // col-sm-*
-
-            if (!first || lastCategory) {
-                html += '</div>'; // row
+                if (next) {
+                    current.removeAttr('data-vim-selected').removeClass('well well-sm');
+                    next.attr('data-vim-selected', 'true').addClass('well well-sm');
+                    scrollPageToSelected();
+                }
             }
         }
 
-        html += '</div>'; // container-fluid
-        html += '</div>'; // vim-hotkeys-help
+        function reloadPage() {
+            document.location.reload(false);
+        }
 
-        $('body').append(html);
+        function removeFocus() {
+            if (document.activeElement) {
+                document.activeElement.blur();
+            }
+        }
+
+        function pageButtonClick(num) {
+            return function() {
+                var buttons = $('div#pagination button[type="submit"]');
+                if (buttons.length !== 2) {
+                    console.log('page navigation with this theme is not supported');
+                    return;
+                }
+                if (num >= 0 && num < buttons.length) {
+                    buttons[num].click();
+                } else {
+                    console.log('pageButtonClick(): invalid argument');
+                }
+            }
+        }
+
+        function scrollPageToSelected() {
+            var sel = $('.result[data-vim-selected]');
+            if (sel.length !== 1) {
+                return;
+            }
+
+            var wnd = $(window);
+
+            var wtop = wnd.scrollTop();
+            var etop = sel.offset().top;
+
+            var offset = 30;
+
+            if (wtop > etop) {
+                wnd.scrollTop(etop - offset);
+            } else  {
+                var ebot = etop + sel.height();
+                var wbot = wtop + wnd.height();
+
+                if (wbot < ebot) {
+                    wnd.scrollTop(ebot - wnd.height() + offset);
+                }
+            }
+        }
+
+        function scrollPage(amount) {
+            return function() {
+                window.scrollBy(0, amount);
+                highlightResult('visible')();
+            }
+        }
+
+        function scrollPageTo(position, nav) {
+            return function() {
+                window.scrollTo(0, position);
+                highlightResult(nav)();
+            }
+        }
+
+        function searchInputFocus() {
+            $('input#q').focus();
+        }
+
+        function openResult(newTab) {
+            return function() {
+                var link = $('.result[data-vim-selected] .result_header a');
+                if (link.length) {
+                    var url = link.attr('href');
+                    if (newTab) {
+                        window.open(url);
+                    } else {
+                        window.location.href = url;
+                    }
+                }
+            };
+        }
+
+        function toggleHelp() {
+            var helpPanel = $('#vim-hotkeys-help');
+            if (helpPanel.length) {
+                helpPanel.toggleClass('hidden');
+                return;
+            }
+
+            var categories = {};
+
+            for (var k in vimKeys) {
+                var key = vimKeys[k];
+                categories[key.cat] = categories[key.cat] || [];
+                categories[key.cat].push(key);
+            }
+
+            var sorted = Object.keys(categories).sort(function(a, b) {
+                return categories[b].length - categories[a].length;
+            });
+
+            if (sorted.length === 0) {
+                return;
+            }
+
+            var html = '<div id="vim-hotkeys-help" class="well vim-hotkeys-help">';
+            html += '<div class="container-fluid">';
+
+            html += '<div class="row">';
+            html += '<div class="col-sm-12">';
+            html += '<h3>How to navigate searx with Vim-like hotkeys</h3>';
+            html += '</div>'; // col-sm-12
+            html += '</div>'; // row
+
+            for (var i = 0; i < sorted.length; i++) {
+                var cat = categories[sorted[i]];
+
+                var lastCategory = i === (sorted.length - 1);
+                var first = i % 2 === 0;
+
+                if (first) {
+                    html += '<div class="row dflex">';
+                }
+                html += '<div class="col-sm-' + (first && lastCategory ? 12 : 6) + ' dflex">';
+
+                html += '<div class="panel panel-default iflex">';
+                html += '<div class="panel-heading">' + cat[0].cat + '</div>';
+                html += '<div class="panel-body">';
+                html += '<ul class="list-unstyled">';
+
+                for (var cj in cat) {
+                    html += '<li><kbd>' + cat[cj].key + '</kbd> ' + cat[cj].des + '</li>';
+                }
+
+                html += '</ul>';
+                html += '</div>'; // panel-body
+                html += '</div>'; // panel
+                html += '</div>'; // col-sm-*
+
+                if (!first || lastCategory) {
+                    html += '</div>'; // row
+                }
+            }
+
+            html += '</div>'; // container-fluid
+            html += '</div>'; // vim-hotkeys-help
+
+            $('body').append(html);
+        }
+    });
+
+    const style = document.createElement('style');
+    style.textContent = `
+    .vim-hotkeys-help {
+        position: fixed;
+        top: 50%;
+        left: 50%;
+        transform: translate(-50%, -50%);
+        z-index: 9999999;
+        overflow-y: auto;
+        max-height: 80%;
+        box-shadow: 0 0 1em;
     }
-});
 
-const style = document.createElement('style');
-style.textContent = `
-.vim-hotkeys-help {
-    position: fixed;
-    top: 50%;
-    left: 50%;
-    transform: translate(-50%, -50%);
-    z-index: 9999999;
-    overflow-y: auto;
-    max-height: 80%;
-    box-shadow: 0 0 1em;
-}
+    .dflex {
+        display: -webkit-box;  /* OLD - iOS 6-, Safari 3.1-6 */
+        display: -moz-box;     /* OLD - Firefox 19- (buggy but mostly works) */
+        display: -ms-flexbox;  /* TWEENER - IE 10 */
+        display: -webkit-flex; /* NEW - Chrome */
+        display: flex;         /* NEW, Spec - Opera 12.1, Firefox 20+ */
+    }
 
-.dflex {
-    display: -webkit-box;  /* OLD - iOS 6-, Safari 3.1-6 */
-    display: -moz-box;     /* OLD - Firefox 19- (buggy but mostly works) */
-    display: -ms-flexbox;  /* TWEENER - IE 10 */
-    display: -webkit-flex; /* NEW - Chrome */
-    display: flex;         /* NEW, Spec - Opera 12.1, Firefox 20+ */
-}
-
-.iflex {
-    -webkit-box-flex: 1; /* OLD - iOS 6-, Safari 3.1-6 */
-    -moz-box-flex: 1;    /* OLD - Firefox 19- */
-    -webkit-flex: 1;     /* Chrome */
-    -ms-flex: 1;         /* IE 10 */
-    flex: 1;             /* NEW, Spec - Opera 12.1, Firefox 20+ */
-}
-`;
-document.head.append(style);
+    .iflex {
+        -webkit-box-flex: 1; /* OLD - iOS 6-, Safari 3.1-6 */
+        -moz-box-flex: 1;    /* OLD - Firefox 19- */
+        -webkit-flex: 1;     /* Chrome */
+        -ms-flex: 1;         /* IE 10 */
+        flex: 1;             /* NEW, Spec - Opera 12.1, Firefox 20+ */
+    }
+    `;
+    document.head.append(style);
 }