Add Widescreen mode option to normal play.

[Dr Zoidcrab]

Considering how much of the screen the chat box takes up having overlaid chat and antag abilities on the hud with widescreen enabled might actually be better for players with lower resolutions(I used to play on a tiny laptop screen). Also the current widescreen mode only seems to add 3 tiles on either side of the player's view regardless of icon scale, so unless im missing something here I don't see how this would give players with a larger screen an advantage.