Bunch of small fixes

Created by: DeityLink

-fixed Laser Rifles spawning in place of Laser Canons at R&D -fixed the cult shoe sprite not covering a certain pixel. a perfectionist? me? -office seats facing north now use an overlay so they don't hide parts of players that they shouldn't technically be hiding. (see pic) -fixed a sanity check that made observers unable to go accross holy turfs if (ticker.mode == null) not that it should happen normally but hey -added airlock/multi_tile to the get Flat Icon exception list -fixed the taxi shuttle consoles showing as unpowered even when they aren't