Fix setting hotkeys when `HotkeySystem` is disabled
Fix setting hotkeys when `HotkeySystem` is disabled

Turns out that in a refactor that we merged, a bug got introduced that
made it so that hotkeys were not being set anymore when the
`HotkeySystem` is disabled. This is fixed now.

CryZe/livesplit-core,CryZe/livesplit-core