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fixes: #2725
Basically a workaround.
UIManager holds the info about which widget is active and ensures a single active widget.
So widgets can grab the active state when they consume mouse press or release events.
All in all the naming is bad and the system introduces a whole new global state, which is bad.
In addition the name
active
is not intuitive, focused would be more common, but we already have experimental UIFocusGroup, which handle completely different requirements.Guess I have to iterate on this again. But for now we needed some sort of fix