Add: Space Cleaner to Drone's Status tab

[TechKat]

A tiny little change: show how much space cleaner drones have on the Status tab. This will slightly improve gameplay for drones and show how much cleaner is refilled while charging in a cyborg charging station. It seems like a minor nitpick, considering there are already status indicators for things like floor tiles, cable, glass, etc.

Yes, I know you can refill space cleaner from the janitor's closet, but... why not have an indicator? (Yes, I know Drones aren't the primary janitors of the station, but that is not the point or even relevant)