Sprite Updates & Fixes

-Fixes a bug with the crew monitoring computer vanishing entirely when broken.
-Fixes a bug with baton rechargers not displaying properly when the baton is fully charged.
-Adds a define for a decorative item for the RD's office. :)

-New sprites for mining lanterns, telescreens (with directionals), directionals for noticeboards, and a service bell. Ding ding!

-Deletes plasma.dmi, which was unused. The plasma tile overlays that are used are in tile_effects.dmi.