* **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
window_->SetTitle(title);
}
std::string TopLevelWindow::GetTitle() {
  return window_->GetTitle();
}
void TopLevelWindow::FlashFrame(bool flash) {
  window_->FlashFrame(flash);
}
void TopLevelWindow::SetSkipTaskbar(bool skip) {
  window_->SetSkipTaskbar(skip);
}
void TopLevelWindow::SetSimpleFullScreen(bool simple_fullscreen) {
  window_->SetSimpleFullScreen(simple_fullscreen);
}
bool TopLevelWindow::IsSimpleFullScreen() {
  return window_->IsSimpleFullScreen();
}
void TopLevelWindow::SetKiosk(bool kiosk) {
  window_->SetKiosk(kiosk);
}
bool TopLevelWindow::IsKiosk() {
  return window_->IsKiosk();
}
void TopLevelWindow::SetBackgroundColor(const std::string& color_name) {
  SkColor color = ParseHexColor(color_name);
  window_->SetBackgroundColor(color);
}
void TopLevelWindow::SetHasShadow(bool has_shadow) {