More printer statuses: idle, cooling down, preheat#16

Maybe include status indicators for Idle, cooling down, preheating etc.?

It would be great (essential) to see the status of autoprint in the status. Oftentimes the printer looks idle but actually it is waiting for the next print job, for the bed clearing movement, for cooldown etc. it would be great to see that without opening the printer -> autoprint -> look what is going on. Sometimes there is no match with any print that is currently in the queue, that is sometimes because the filament was synced incorrect. That would instantly be visible if it would show “no next item in the print queue” in the status bar as well.

This would be good for knowing when the printer is “cooling” for bed clearance. It would mean at a glance you could tell the difference between cooling and a printer finished with none left in the q. We have accidentally clicked “clear bed” when a printer is cooling down before, to start a new print on it, but it still has things waiting in the q for it. I hope that makes sense.