* **Electron Version:**
  4.0.2
* **Operating System:**
  macOS 10.14.3
* **Last Known Working Electron version:**:
  1.7

### Expected Behavior
When creating a BrowserWindow it should not appear in the dock menu by defaults.

### Actual Behavior
It appears in the dock menu (example: `raven` in https://electronjs.org/docs/tutorial/macos-dock)

### To Reproduce
Just create new BrowserWindow, then right click on the app icon in the dock. (see https://electronjs.org/docs/tutorial/macos-dock)

At least it should be a way to control that, this can be achieve for top level window with:
`[window_ setExcludedFromWindowsMenu:YES];`, indeed [window isExcludedFromWindowsMenu] returns false by default, see

https://developer.apple.com/documentation/appkit/nsapplication/1428625-removewindowsitem
`Use the isExcludedFromWindowsMenu method of NSWindow if you want the item to remain excluded from the Window menu.`
https://developer.apple.com/documentation/appkit/nswindow/1419175-isexcludedfromwindowsmenu

atom/browser/api/atom_api_top_level_window.h
return weak_factory_.GetWeakPtr();
  }
  NativeWindow* window() const { return window_.get(); }
 protected:
  
  TopLevelWindow(v8::Isolate* isolate, const mate::Dictionary& options);
  
  TopLevelWindow(v8::Isolate* isolate,
                 v8::Local<v8::Object> wrapper,
                 const mate::Dictionary& options);
  ~TopLevelWindow() override;
  
  void InitWith(v8::Isolate* isolate, v8::Local<v8::Object> wrapper) override;
  
  void WillCloseWindow(bool* prevent_default) override;
  void OnWindowClosed() override;
  void OnWindowEndSession() override;
  void OnWindowBlur() override;
  void OnWindowFocus() override;
  void OnWindowShow() override;
  void OnWindowHide() override;
  void OnWindowMaximize() override;
  void OnWindowUnmaximize() override;
  void OnWindowMinimize() override;
  void OnWindowRestore() override;
  void OnWindowWillResize(const gfx::Rect& new_bounds,
                          bool* prevent_default) override;
  void OnWindowResize() override;
  void OnWindowWillMove(const gfx::Rect& new_bounds,