Instancing changes and minor hotfixes

- Fixed a space tile under an airlock at the Vox Outpost
- Fixed areas on the Asteroid
- Modified instances of floor tiles (wooden and regular), platings and grilles to
be broken whenever applicable at roundstart based on their skin. This notably affects the Derelict
- Added lightswitches to some rooms in the Research Outpost. Areas need
to be cut up further in all other areas
- Re-added destination tagger and simplified conveyor belt in the Cargo Mailing Room