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### 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
SetBackground(views::CreateSolidBackground(background_color_));
  
  if (menu_model_ == nullptr)
    return;
#if defined(OS_LINUX)
  const auto& textColor = has_focus_ ? enabled_color_ : disabled_color_;
  for (auto* child : GetChildrenInZOrder()) {
    auto* button = static_cast<SubmenuButton*>(child);
    button->SetTextColor(views::Button::STATE_NORMAL, textColor);
    button->SetTextColor(views::Button::STATE_DISABLED, disabled_color_);
    button->SetTextColor(views::Button::STATE_PRESSED, enabled_color_);
    button->SetTextColor(views::Button::STATE_HOVERED, textColor);
    button->SetUnderlineColor(textColor);
  }
#elif defined(OS_WIN)
  for (auto* child : GetChildrenInZOrder()) {
    auto* button = static_cast<SubmenuButton*>(child);
    button->SetUnderlineColor(color_utils::GetSysSkColor(COLOR_MENUTEXT));
  }
#endif
}
}