Add ability to configure hotkeys for scoreboard video / stream overlay admin panel

[aidanmontare-edu]

The admin page for the video overlays has keyboard shortcuts, but not the ability to customize them. It would be nice if you could do this like the main operator page.

Mostly I’d like this so I could set the show/hide button to something, which would make it easier to switch what goes on video when livestreaming.

Might try taking a look at adding this myself if I have the chance.