Right click->Quit on the godot icon will now close the application on OSX.

Fixed get_window_position that missed a return on OSX.

(cherry picked from commit 76ab7d3886)

platform/osx/os_osx.mm

@@ -139,11 +139,9 @@ static int button_mask=0;
 
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
 {
-/*    _Godotwindow* window;
+	if (OS_OSX::singleton->get_main_loop())
+		OS_OSX::singleton->get_main_loop()->notification(MainLoop::NOTIFICATION_WM_QUIT_REQUEST);
 
-    for (window = _Godot.windowListHead;  window;  window = window->next)
-	_GodotInputWindowCloseRequest(window);
-*/
 	return NSTerminateCancel;
 }