MDL-44810 editor_atto: restore selection after button press

Fixed issue where clicking on buttons erroneously lost viewport focus and selection.

lib/editor/atto/yui/build/moodle-editor_atto-plugin/moodle-editor_atto-plugin-debug.js

@@ -95,6 +95,11 @@ Y.extend(EditorPlugin, Y.Base, {
      * @method markUpdated
      */
     markUpdated: function() {
+        // Save selection after changes to the DOM. If you don't do this here,
+        // subsequent calls to restoreSelection() will fail expecting the
+        // previous DOM state.
+        this.get('host').saveSelection();
+
         return this.get('host').updateOriginal();
     }
 }, {
@@ -760,6 +765,9 @@ EditorPluginButtons.prototype = {
         // Build the arguments list, but remove the callback we're calling.
         var args = [e, callbackArgs];
 
+        // Restore selection before making changes.
+        this.get('host').restoreSelection();
+
         // Actually call the callback now.
         return callback.apply(this, args);
     },

lib/editor/atto/yui/build/moodle-editor_atto-plugin/moodle-editor_atto-plugin.js

@@ -95,6 +95,11 @@ Y.extend(EditorPlugin, Y.Base, {
      * @method markUpdated
      */
     markUpdated: function() {
+        // Save selection after changes to the DOM. If you don't do this here,
+        // subsequent calls to restoreSelection() will fail expecting the
+        // previous DOM state.
+        this.get('host').saveSelection();
+
         return this.get('host').updateOriginal();
     }
 }, {
@@ -758,6 +763,9 @@ EditorPluginButtons.prototype = {
         // Build the arguments list, but remove the callback we're calling.
         var args = [e, callbackArgs];
 
+        // Restore selection before making changes.
+        this.get('host').restoreSelection();
+
         // Actually call the callback now.
         return callback.apply(this, args);
     },

lib/editor/atto/yui/src/editor/js/editor-plugin-buttons.js

@@ -618,6 +618,9 @@ EditorPluginButtons.prototype = {
         // Build the arguments list, but remove the callback we're calling.
         var args = [e, callbackArgs];
 
+        // Restore selection before making changes.
+        this.get('host').restoreSelection();
+
         // Actually call the callback now.
         return callback.apply(this, args);
     },

lib/editor/atto/yui/src/editor/js/editor-plugin.js

@@ -93,6 +93,11 @@ Y.extend(EditorPlugin, Y.Base, {
      * @method markUpdated
      */
     markUpdated: function() {
+        // Save selection after changes to the DOM. If you don't do this here,
+        // subsequent calls to restoreSelection() will fail expecting the
+        // previous DOM state.
+        this.get('host').saveSelection();
+
         return this.get('host').updateOriginal();
     }
 }, {