Lots of fixes

-possibly fixed navmesh sometimes not generating (making SCPs not move)
-fixed SCP-1499 teleporting
-fixed class d ragdolls falling from the ceiling in 173room after the intro
-fixed breach sounds heard everywhere on save load
-fixed button sounds
-fixed 420-J not spawning from the console
-fixed 096 room levers
-fixed broken 049room door being openable
-fixed vest culling and inventory-able