Shows speech bubbles when inside lockers/mechs/nonturfs

Created by: 9600bauds

It stands to reason that if you can hear someone speaking from inside a locker, you oughta be able to know loosely where it's coming from.

Known issue: The speech bubble will follow the thing that you were inside of, rather than yourself, meaning it will cling to the locker even after you exit it. I don't think there's any feasible way to fix this and given that the bubble lasts 3 seconds I don't think it's a big problem.

Partial fix for #4858 (closed)