Added inflatable walls and airlocks.
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into dev
Inflatable barrier boxes added to engineering. Inflatable barrier crates can be ordered by the QM. Briefcase icon_state fixed.
Updated changelog.
Missing files added.
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into dev
Merge pull request #4655 from RavingManiac/dev

Inflatable walls and airlocks