MDL-51227 editor_atto: Stop Chrome losing selection when formating

Conflicts:
	lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-min.js

lib/editor/atto/yui/src/editor/js/styling.js

@@ -87,12 +87,9 @@ EditorStyling.prototype = {
      */
     toggleInlineSelectionClass: function(toggleclasses) {
         var classname = toggleclasses.join(" ");
-        var originalSelection = this.getSelection();
         var cssApplier = rangy.createCssClassApplier(classname, {normalize: true});
 
         cssApplier.toggleSelection();
-
-        this.setSelection(originalSelection);
     },
 
     /**
@@ -100,12 +97,11 @@ EditorStyling.prototype = {
      *
      * This will set inline styles on the current selection.
      *
-     * @method toggleInlineSelectionClass
+     * @method formatSelectionInlineStyle
      * @param {Array} styles - Style attributes to set on the nodes.
      */
     formatSelectionInlineStyle: function(styles) {
         var classname = this.PLACEHOLDER_CLASS;
-        var originalSelection = this.getSelection();
         var cssApplier = rangy.createCssClassApplier(classname, {normalize: true});
 
         cssApplier.applyToSelection();
@@ -114,7 +110,6 @@ EditorStyling.prototype = {
             node.removeClass(classname).setStyles(styles);
         }, this);
 
-        this.setSelection(originalSelection);
     },
 
     /**