Gas Mask QoL reduction

[colossusqw]

I feel like some minor visibility loss could do the trick, similar to how the steel masks work atm. It's relevant to non-antags, but it doesn't disrupt most non-combat related activities. Want to work on lab stuff? Doesn't change much. Want to use it everywhere you go for no reason? Yeah that might be a problemo. (obviously not applicable to nukie masks and the like)