[Map] HoloDodgeball & More

-Replaces the holodeck boxing ring that no longer works with a dodgeball arena. Adds dodgeball sprites, define, sound.

-Fixes the crew monitoring console disappearing when damaged (meant to do this before but the change didn't go through somehow)
-Makes tables use a less hardcoded method to determine iconstate.

-Readds the space piano, removes the useless /device subtype from its path.
-Adds a two-headed coin to maintenance.
-Adds the RD's plant to his office.
-Adds lightswitch to hydroponics back room.