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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.h
#ifndef SHELL_BROWSER_UI_VIEWS_MENU_BAR_H_
#define SHELL_BROWSER_UI_VIEWS_MENU_BAR_H_
#include <memory>
#include "shell/browser/ui/electron_menu_model.h"
#include "shell/browser/ui/views/menu_delegate.h"
#include "shell/browser/ui/views/root_view.h"
#include "ui/views/accessible_pane_view.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/focus/focus_manager.h"
#include "ui/views/view.h"
namespace views {
class Button;
class MenuButton;
}  
namespace electron {
class MenuBarColorUpdater : public views::FocusChangeListener {
 public:
  explicit MenuBarColorUpdater(MenuBar* menu_bar);
  ~MenuBarColorUpdater() override;
  void OnDidChangeFocus(views::View* focused_before,
                        views::View* focused_now) override;
  void OnWillChangeFocus(views::View* focused_before,
                         views::View* focused_now) override {}
 private:
  MenuBar* menu_bar_;
};
class MenuBar : public views::AccessiblePaneView,