Give the floor buffer an off switch

[BeardedElectron]

If the buffer does get some buttons, it would be nice if you could load up the floor signs and have a button to deploy them.

We need a UI button just like you have for sirens for segways to turn the buffing feature on or off. It would also be great if there was a better indicator of when the tank was full or empty, I find trying to fill it a guessing game.