AppWindow is the core module of the new Window Management System. As a module I would like to keep it has no dependency on other environmental modules. Excluding the sub modules, now we have SettingsListener and OrientationManager. For SettingsListener, it's the suspending app support. We might use Mediator or Factory and send the settings when creating new AppWindow instances. For OrientationManager, maybe we could detect window.OrientationManager and request to lock orientation if there is, lock the orientation directly if there is not.