Merge branch 'master' into taborder

# Conflicts:
#	js/libs/fluidbook/fluidbook.keyboard.js

diff --cc js/libs/fluidbook/fluidbook.keyboard.js
index f2ddedcaf9c45996bad2e578339ecb0fd3e4ae75,58c6908557bc02b09889875802f6d9c3ebe3bd7e..2fb027686fa05c5ba6c99b302a13145b9e20511b
--- 1/js/libs/fluidbook/fluidbook.keyboard.js
--- 2/js/libs/fluidbook/fluidbook.keyboard.js
+++ b/js/libs/fluidbook/fluidbook.keyboard.js
@@@ -68,79 -42,50 +54,119 @@@ FluidbookKeyboard.prototype = 
  
          this.keyShortcut('f10', function () {
              $this.fluidbook.nav.burger.toggle();
-         })
+         });
+ 
+         setInterval(function () {
+             $this.listenToIframeEscapeEvents();
+         }, 500);
+     },
+ 
+     listenToIframeEscapeEvents: function () {
+         var $this = this;
+         $('iframe:not(.listenescape)').each(function () {
+             $(this).addClass('listenescape');
+             let iframe = $(this);
+             $(this).on('load', function () {
+                 let win = $(iframe).get(0).contentWindow;
+                 let doc = win.document;
+                 doc.addEventListener('keydown', function (e) {
+                     if (e.code === 'Escape') {
+                         $this.escape();
+                     }
+                 });
+             });
+ 
+         });
+     },
+ 
+     escape: function () {
+         if (this.fluidbook.help.isVisible()) {
+             this.fluidbook.help.hide();
+         }
+         if (this.fluidbook.menu.viewMode()) {
+             this.fluidbook.menu.closeView(function () {
+ 
+             }, true, true);
+         }
+         this.fluidbook.search.closeSearch();
+         this.fluidbook.search.closeResultsNav();
+         this.fluidbook.nav.burger.close();
+ 
+         if (this.fluidbook.support.isFullscreen()) {
+             document.exitFullscreen();
+         }
      },
  
 -    _navigate: function (list, dir, actions) {
 +
 +    tabNavigationSections: function (selectors, dir) {
 +        let currentSection = -1;
 +        let active = $(document.activeElement);
 +
 +        $.each(selectors, function (k, s) {
 +            if (active.is(s) || active.closest(s).length > 0) {
 +                currentSection = k;
 +                return false;
 +            }
 +        });
 +
 +        if (currentSection === -1) {
 +            currentSection = 0;
 +        }
 +        let loop = 0;
 +        while (!this.tabNavigation(selectors[currentSection], dir, false, loop > 0)) {
 +            currentSection += dir;
 +            if (currentSection >= selectors.length || currentSection < 0) {
 +                return false;
 +            }
 +            loop++;
 +            if (loop++ > selectors.length) {
 +                break;
 +            }
 +        }
 +        return true;
 +    },
 +
 +    tabNavigation: function (selector, dir, loop, switchList) {
 +        if (switchList === undefined) {
 +            switchList = false;
 +        }
 +        if (loop === undefined) {
 +            loop = true;
 +        }
 +        const focusableElementsString = 'a[href], area[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, [tabindex="0"]:not(.ps__thumb-x):not(.ps__thumb-y), [contenteditable]';
 +        let elements;
 +        if ($(selector).is(focusableElementsString)) {
 +            elements = $(selector);
 +        } else {
 +            elements = $(selector).find(focusableElementsString);
 +        }
 +        var list = [];
 +        $(elements).each(function () {
 +            if (parseInt($(this).attr('tabindex')) < 0) {
 +                return;
 +            }
 +            if ($(this).parents('[tabindex="-1"],.ignore-tab-children').length === 0 && $(this).is(':visible')) {
 +                list.push(this);
 +            }
 +        });
 +        if (list.length === 0) {
 +            console.log(selector, 'nothing here');
 +            return false;
 +        }
 +        let res = this._navigate(list, dir, ['focus'], loop, switchList);
 +        if (!res) {
 +            console.log(selector, 'end of list');
 +        }
 +        return res;
 +    },
 +
 +    _navigate: function (list, dir, actions, loop, switchList) {
 +        if (switchList === undefined) {
 +            switchList = false;
 +        }
 +        if (loop === undefined) {
 +            loop = true;
 +        }
          if (actions === undefined) {
              actions = ['focus'];
          }
@@@ -178,9 -114,28 +205,25 @@@
                  $(ne).click();
              }
          });
++
 +        return true;
      },
  
 -        //console.log('elements', elements);
+     tabNavigation: function (selector, dir) {
+         var focusableElementsString = 'a[href], area[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, [tabindex="0"]:not(.ps__thumb-x):not(.ps__thumb-y), [contenteditable], button';
+         var elements = $(selector).find(focusableElementsString);
+         var list = [];
 -                //console.log('skip because of tabindex', this);
+         $(elements).each(function () {
+             if ($(this).attr('tabindex') == '-1') {
 -            } else {
 -                //console.log('skip because of parent or not being visible', this);
+                 return;
+             }
+             if ($(this).parents('.ignore-tab-children').length === 0 && $(this).is(':visible')) {
+                 list.push(this);
 -        //console.log('list', list);
 -        this._navigate(list, dir);
+             }
+         });
++        return this._navigate(list, dir);
+     },
+ 
      initBookmarksShortcuts: function () {
          var $this = this;
          this.keyShortcut('ctrl+alt+d', function () {