message: Minor fix in menu
diff: @@ -136,7 +136,7 @@ export class MenuService {
  getEl(flatIdx:number):Element {
  if (flatIdx < 0) return null;
  let currentItem = this.flatItems[flatIdx];
  -
  + if (!currentItem) return;
  if (currentItem.isGroup) currentItem = this.flatItems[flatIdx + 1];
  let selector = '';
  