Add support for hotkeys (e.g. pausing/resuming music using space key anywhere)

[OriginCode]

What do you want to be added?

Currently pressing the space key to pause/resume music only works when previously clicked on the pause/play button on the bottom (selected the button). It would be nice if I can pause/resume music anywhere in the player.

Additional context

N/A

[jeffvli]

I'll eventually be adding this functionailty in the form a global hotkey manager in the settings page.