0003852: Remove an item from the game when it detaches from an AI
Description
We need a new spawnarg for removing an item from the game when it detaches from an AI.
Items marked with "remove" are removed when the AI dies or is KO'ed, but this doesn't cover other situations where the AI remains conscious. (I.e. removing cards when a card-playing AI is alerted.)
Create spawnarg “destroy_on_detach” and set it to “1” for items (like multiple and single cards) that should be removed from the game when detached from an AI.
