Add a gigantic timer to the top of the screen once the nuke is armed

[Zamujasa]

I think this was actually being prototyped at one point, but I don't think it made it in game.

The only issue I could see with it would be potentially overlapping ability buttons or other status information along the top of the screen, but that's probably not really worth worrying about since outside of badmin gimmicks nobody will have enough abilities to reach the second line.