Global Hotkeys not Blocked while Alert is Open

[Firionus]

tested version: commit 9c40c2

Steps to reproduce

• Go to Patch -> Fixture Types
• Add a GDTF file and try to remove it
• while the confirmation dialog is open, try to use any of the usual hotkeys (like Esc or i)

Observed Behavior

All hotkeys still work as if the dialog wasn't open, e.g. Esc closes out of the Patch.

Expected Behavior

All hotkeys that don't belong to the Dialog should be blocked, e.g. Esc should only close out of the Dialog and i should do nothing.

Additionally, it would be nice if the hotkey hints (behind the button labels) for the disabled hotkeys would disappear.

ToDo

• [x] Test on Add FixtureType or Depedency Graph Dialog