internationalise comment shortcut fixes #1167

Author: ArztKlein

client/modules/IDE/components/Editor.jsx

@@ -159,7 +159,8 @@ class Editor extends React.Component {
       // choose a color, it deletes characters inline. This is a
       // hack to prevent that.
       [`${metaKey}-K`]: (cm, event) =>
-        cm.state.colorpicker.popup_color_picker({ length: 0 })
+        cm.state.colorpicker.popup_color_picker({ length: 0 }),
+      [`${metaKey}-.`]: 'toggleComment' // Note: most adblockers use the shortcut ctrl+.
     });
 
     this.initializeDocuments(this.props.files);

client/modules/IDE/components/KeyboardShortcutModal.jsx

@@ -61,6 +61,10 @@ function KeyboardShortcutModal() {
           <span className="keyboard-shortcut__command">{metaKeyName} + /</span>
           <span>{t('KeyboardShortcuts.CodeEditing.CommentLine')}</span>
         </li>
+        <li className="keyboard-shortcut-item">
+          <span className="keyboard-shortcut__command">{metaKeyName} + .</span>
+          <span>{t('KeyboardShortcuts.CodeEditing.CommentLine')}</span>
+        </li>
         <li className="keyboard-shortcut-item">
           <span className="keyboard-shortcut__command">{metaKeyName} + K</span>
           <span>{t('KeyboardShortcuts.CodeEditing.ColorPicker')}</span>