Airlock construction fix

- door electronics now stay on mob until fully installed
- text fix
Painkillers leave body correctly

Tramadol, paracetamol and oxy will now leave a mob's body. Fixes #5150.
Health analyzers display blood type

Saves having to mess around with your PDA during a crisis (not really,
just grab that O- bag)
Merge pull request #5152 from sick-trigger/master

Small fixes/changes