[AI] Group flickering jobs

[werz]

Recently, in order to save some power, I had to switch down the light of two unused cells in my prison, so I did ask for it.

At some point, I saw a colonist enter the prison, switch down one light, and leave, letting the other one on. I was annoyed and tried to ask him to flicker the other light while it was close but the task was already reserved by another pawn (that decided to travel the map to do that).

I think that flickering jobs should be grouped together in a way that avoids this kind of suboptimal behavior without micro-managing it.

(not very annoying though, I love this game)