Let robots carry multiple item types when deconstructing entities

[radical_larry]

The issue with robots deconstructing rocks and leaving coal behind is old by now, but back then it wasn't that bad because few rocks have coal and letting the robots clean up those items one by one didn't take so long. But this got pretty ridiculous with space age, as every planet is littered in decoration entities each containing multiple item types and sometimes hundreds of items. Robots should be able to pick up everything an entity drops when mining it and bring it to the player, instead of littering the ground.