* **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
Emit("session-end");
}
void TopLevelWindow::OnWindowBlur() {
  EmitEventSoon("blur");
}
void TopLevelWindow::OnWindowFocus() {
  EmitEventSoon("focus");
}
void TopLevelWindow::OnWindowShow() {
  Emit("show");
}
void TopLevelWindow::OnWindowHide() {
  Emit("hide");
}
void TopLevelWindow::OnWindowMaximize() {
  Emit("maximize");
}
void TopLevelWindow::OnWindowUnmaximize() {
  Emit("unmaximize");
}
void TopLevelWindow::OnWindowMinimize() {