Remove KWindowInfo backend plumbing
KWindowInfo is de-facto X11-only. There's little point in having a full plugin system if most of the plugins don't do anything.
Make the class properly X11-only and fold the implementation into the main class
KWindowInfo is de-facto X11-only. There's little point in having a full plugin system if most of the plugins don't do anything.
Make the class properly X11-only and fold the implementation into the main class