message: fix: left menu item before group is not highligted
  fixes
diff: @@ -116,7 +116,7 @@ export class MenuStore {
  }
  if (isScrolledDown) {
  - const el = this.getElementAt(itemIdx + 1);
  + const el = this.getElementAtOrFirstChild(itemIdx + 1);
  if (this.scroll.isElementBellow(el)) {
  break;
  }
  @@ -163,6 +163,18 @@ export class MenuStore {
  return (item && querySelector(`[${SECTION_ATTR}="${item.id}"]`)) || null;
  }
  + /**
  + * get section/operation DOM Node related to the item or if it is group item, returns first item of the group
  + * @param idx item absolute index
  + */
  + getElementAtOrFirstChild(idx: number): Element | null {
  + let item = this.flatItems[idx];
  + if (item && item.type === 'group') {
  + item = item.items[0];
  + }
  + return (item && querySelector(`[${SECTION_ATTR}="${item.id}"]`)) || null;
  + }
  +
  /**
  * current active item
  */
  