The cooling loop filters and pumps are now back in the engine room after feedback. The canisters are still available to atmos techs but are slightly more secured.
Feedback based changes.

Engine waste is now fully self-contained and "loops" back.
Clears out the engine airlock.
Spreads the vent and scrubber in the engine room apart somewhat.
Merge remote-tracking branch 'upstream/dev' into Engine
Makes the engine room comply with the new atmospherics changes.
Windoor at the security arrival checkpoint now has the same requirements as of those in the security brig lobby.
Merge remote-tracking branch 'upstream/dev' into Engine
Merge pull request #5932 from PsiOmegaDelta/Sec

Arrival checkpoint access
Merge pull request #5888 from PsiOmegaDelta/Engine

Engine room facelift