Uniform lighting toggle for ghosts (especially since lighting update)

[salix_catus]

Says it all in the title really. The new lighting has made gameplay more fun. but it's made observing as a ghost less fun. it's fun to see people running around in the dark whilst you can see them perfectly.

[Burrito Justice]

I think I heard somewhere that Tobba was working on it. I could be wrong, though.

[somepotato]

This would be really easy if BYOND planes weren't terrible. The best we might be able to get is just brightening the screen when dead