I started it, may pull some kind of funding thing to get it completed as its a lot of work and I need to eat.

All the users demanding a UI system and talking of subscription nonsense and such .. are you willing to back a user developed UI plugin ??, if you back it, I will build it.

The current state of my WinUI plugin is: v0.4a (functional but incomplete)

oid WinUI.UpdateMenu(integer window_id)