Created by: wwjnc
- Fixed #4034 (closed); SSUs decontaminating suits is intended as per the description ([...] also allows the user to decontaminate the contents through a UV-ray purging cycle)
- Fixed terminal bugs with SMES (#3257 (closed), #4036 (closed)) and added missing busy checks that resulted in duplicated stuff.
- Fixed fire (and air) alarm bug #3354 (closed) and added sounds and message feedback to the construction steps.
- APC and computer construction/deconstruction have busy checks now.
- APCs now have to be wired from the correct direction, just like the SMES.
I plan to refactor wall mounted stuff (esp. air alarms) so they can be a bit more modular than the copypasted mess they are right now.