Add a HUD Icon for Deafness

[KikiMofo]

I think we should have a icon for each of the debilities. We already show stun timers and stuff. Might as well go for deafness times and gasping timers.

What do you mean by gasping timers? The gasping results from suffocation, so i would say you cant really use a timer for it. Unless you want it to restart every time you walk into an airless tile.

Also have to think about what should show a symbol and what not, or maybe when. Changeling stings and other poisons shouldnt immediately have an icon pop up top right. This is a current problem the radbow has.

I meant like for if you get injected with perfluoro