add a space cleaner dispenser to the janitor's office

[Vitatroll]

It'd be REALLY nice if we could refill the buffer directly from tanks and sinks, but I understand how horrible that could be I guess. Still wish we had it so I didn't have to go find an artbeaker.

I stay with my opinion on space cleaner though. If we could make it without hassle then the mop would get too little use as janitors actually like to clean things while slipping people surprisingly.