QRF units never despawn

[rekterakathom]

There is no system to despawn QRF units after a battle is over, so they potentially stick around forever.

This is a pretty huge amount of units, so performance will probably take a pretty big hit.

[aaronstatic]

its a tough one because the player/s are supposed to remove them, regardless of the outcome of the battle, but so often a battle happens that the player was either not prepared for or not wanting to happen because they are focused elsewhere. Ideally maybe the bulk of them should be "extracted" properly (with the chance to ambush those extractions) and some of them do remain to shore up stability etc