NavigationDrawer needs update?

```
func applicationDidFinishLaunching(_ application: UIApplication) {
window = UIWindow(frame: Screen.bounds)
window!.rootViewController = AppNavigationDrawerController(rootViewController: rootViewController,
leftViewController: leftViewController,
rightViewController: rightViewController)
window!.makeKeyAndVisible()
}
```

Doesn't seem to work for me but if i throw it into application constructor it does work for me.

Don't know if maybe I'm wrong. Please check.
Thanks and Cheers great project.