They could add an "Are you sure?" requester, a LOOT ALL button in the window, or increase the amount of time a fully-looted corpse hangs around.

I've begun looting my corpse with the intention to leave an item on it, only to drift off into the mind-numbing process of hovering over and right-clicking each item ... granted I didn't petition them to announce my stupidity, but with all the annoyances they've eliminated from the game, this one's climbed to the top of my list.