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* [x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:**
  * 12.0.0-beta.1 to 12.0.0-beta.6
* **Operating System:**
  * Windows 10 (2004) 
* **Last Known Working Electron version:**
  * 11.x.x (all of them)

### Expected Behavior
Click on Menu Item opens the submenu of this item

### Actual Behavior
Clicking on menu set with Menu.setApplicationMenu(Menu.buildFromTemplate(topLevelItems)); is not possible. Pressing "ALT" Highlights the menu but nothing more happens

### To Reproduce
Build Application with menu
shell/browser/ui/views/menu_bar.cc
views::View* focused_view = GetFocusManager()->GetFocusedView();
  if (!ContainsForFocusSearch(this, focused_view))
    return false;
  switch (accelerator.key_code()) {
    case ui::VKEY_MENU:
    case ui::VKEY_ESCAPE: {
      RemovePaneFocus();
      window_->RestoreFocus();
      return true;
    }
    case ui::VKEY_LEFT:
      GetFocusManager()->AdvanceFocus(true);
      return true;
    case ui::VKEY_RIGHT:
      GetFocusManager()->AdvanceFocus(false);
      return true;
    case ui::VKEY_HOME:
      GetFocusManager()->SetFocusedViewWithReason(
          GetFirstFocusableChild(),
          views::FocusManager::FocusChangeReason::kFocusTraversal);
      return true;
    case ui::VKEY_END:
      GetFocusManager()->SetFocusedViewWithReason(
          GetLastFocusableChild(),
          views::FocusManager::FocusChangeReason::kFocusTraversal);
      return true;
    default: {
      for (auto* child : GetChildrenInZOrder()) {