* **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.cc
.SetMethod("isMinimizable", &TopLevelWindow::IsMinimizable)
      .SetMethod("setMaximizable", &TopLevelWindow::SetMaximizable)
      .SetMethod("isMaximizable", &TopLevelWindow::IsMaximizable)
      .SetMethod("setFullScreenable", &TopLevelWindow::SetFullScreenable)
      .SetMethod("isFullScreenable", &TopLevelWindow::IsFullScreenable)
      .SetMethod("setClosable", &TopLevelWindow::SetClosable)
      .SetMethod("isClosable", &TopLevelWindow::IsClosable)
      .SetMethod("setAlwaysOnTop", &TopLevelWindow::SetAlwaysOnTop)
      .SetMethod("isAlwaysOnTop", &TopLevelWindow::IsAlwaysOnTop)
      .SetMethod("center", &TopLevelWindow::Center)
      .SetMethod("setPosition", &TopLevelWindow::SetPosition)
      .SetMethod("getPosition", &TopLevelWindow::GetPosition)
      .SetMethod("setTitle", &TopLevelWindow::SetTitle)
      .SetMethod("getTitle", &TopLevelWindow::GetTitle)
      .SetMethod("flashFrame", &TopLevelWindow::FlashFrame)
      .SetMethod("setSkipTaskbar", &TopLevelWindow::SetSkipTaskbar)
      .SetMethod("setSimpleFullScreen", &TopLevelWindow::SetSimpleFullScreen)
      .SetMethod("isSimpleFullScreen", &TopLevelWindow::IsSimpleFullScreen)
      .SetMethod("setKiosk", &TopLevelWindow::SetKiosk)
      .SetMethod("isKiosk", &TopLevelWindow::IsKiosk)
      .SetMethod("setBackgroundColor", &TopLevelWindow::SetBackgroundColor)
      .SetMethod("setHasShadow", &TopLevelWindow::SetHasShadow)
      .SetMethod("hasShadow", &TopLevelWindow::HasShadow)
      .SetMethod("setOpacity", &TopLevelWindow::SetOpacity)
      .SetMethod("getOpacity", &TopLevelWindow::GetOpacity)
      .SetMethod("setShape", &TopLevelWindow::SetShape)
      .SetMethod("setRepresentedFilename",
                 &TopLevelWindow::SetRepresentedFilename)
      .SetMethod("getRepresentedFilename",
                 &TopLevelWindow::GetRepresentedFilename)