[feature request] option to forward controller input to a window without having to have a pointer on said window (for playing flatscreen games)

currently, if you want to control a flatscreen game using WayVR, you need to have a pointer focused on the game window, this becomes an issue when a game supports mouse & controller at the same time. Giving an option to always be able to control a game without having to have a pointer in the game's window would be useful to alleviate this.