Same offscreen probe; original production hotkey callback vs new production ReceiveHotkey.

BFI 1.14.19.9
Initially on; queued B presses=2; wanted on=True; actual on=False; emergency stop before UI dispatch=True
Initially on; queued B presses=3; wanted on=False; actual on=False; emergency stop before UI dispatch=True
Initially on; queued B presses=4; wanted on=True; actual on=False; emergency stop before UI dispatch=True
Only own offscreen windows; no global keyboard injection, no optical measurement.

BFI 1.14.19.10
Initially on; queued B presses=2; wanted on=True; actual on=True; emergency stop before UI dispatch=True
Initially on; queued B presses=3; wanted on=False; actual on=False; emergency stop before UI dispatch=True
Initially on; queued B presses=4; wanted on=True; actual on=True; emergency stop before UI dispatch=True
Only own offscreen windows; no global keyboard injection, no optical measurement.
