A small tweak of construction bots

[Sir Nick]

Came across a small detail in Construction bots' behaviour that strikes me as strange. If I have a roboport stuffed with reppacks AND a supply chest with reppacks, construction robots will go to replenish their reppacks to the chest, not to the port. IMO it makes sense that if I went to pains of stocking the roboport itself, it is because I _really_ want the repairs ASAP.

[immibis]

It seems like the roboport slots are only for robots to store repair packs that aren't completely used up. Construction bots can take repair packs from the roboport they're docked in, but not from other roboports.

[Sir Nick]

Well, they didn't take them from the one they were in either.