[8.42] Free weapon upgrades

[Exodus]

Its funny how the two problems you described here are directly linked together. Normally its not possible to pick up items which where place into a tower, even if the owning player left. But when upgrading a weapon, the item upgrade trigger sets the owning player of the item to the one who owns the unit which is upgrading the item, in this case the tower. And because anyone can pick an item which is owned by any other than the 10 players, you could take the former enemy items.

Will be fixed next version.