UnbindKeyCombo does not work without providing a handler

[thiemok]

Describe the bug
UnbindKeyCombo does not remove bindings properly when no handler is provided to the call.
I believe this might be happening because keyComboStatesArray is not updated here

To Reproduce
Steps to reproduce the behavior:

1. Pick a shortcut
2. Call bindKeyCombo(shortcut, () => console.log('a'))
3. Call unbindKeyCombo(shortcut)
4. Call bindKeyCombo(shortcut, () => console.log('b'))
5. Trigger shortcut

Expected behavior
Console logs only "b"