GNOME's overview delivers the Super press to the game window, eats the
release and hands the keyboard back without a FocusOut. The backend kept
Command held, so every later key and click reached the game as a Command
shortcut until a real focus change reconciled it (issue #74).
Each key, button, motion and crossing event carries the server's modifier
state; release any modifier key we track as down whose modifier is missing
from it. Synthetic events from other clients are ignored.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
