Fixes #3188 - Mods can now see deadchat

Mods can now see deadchat regardless of whether they're ghosted or not.
Works with the deadchat toggle.
Merge pull request #3186 from meyar/bleeding-edge-freeze

Re-adds the barman shotgun permit Fixes a security maintenance area issue.
Whitellama's changelog merge.
I hate the changelog.
Merge pull request #3192 from Zuhayr/feature

Whitellama's changelog merge.
Medbay Tweaks

Edits to Chem, Virology and Reception. Replaced some lights, added some
more windows about the Medbay, reticulated splines.
Merge pull request #3196 from Vetinarix/bleeding-edge-freeze

Medbay Tweaks
Merge pull request #3190 from Kilakk/bleeding-edge-freeze

Fixes #3188 - Mods can now see deadchat
Fixes a few shutters. Root cause unknown.