Auto forbid items in fog of war

[StStep]

I had allow pickup of items from dead enemies enabled, and I think some mutant dogs died of old age in a building I hadn't explored yet and my people went and tried and picked up their bones and then trigger attacks.

[SerialKicked]

I'm under the impression I already do exactly that (invisible cargo tiles not being processed) but that was before those orders, the function might have disappeared gone the way of the dodo.

I'll have a look, shouldn't be an issue to (re)implement.