Pick-up item when backpack full: Target next closest item if pick-up prompts "backpack full" message

Items lying on the ground too close to each other are hard to pick up purposefully.
Aiming at the other item doesn't work most of the time. Sorting them out with a full backpack becomes tedious, especially since you can't drop stuff again.

When the pick-up action on an item results in the "backpack full" message, the currently targeted item should be untargeted automatically and the target should move over to the next closest item to enable its pickup.

This way it would be easy - as an example, to quickly discard wood for those gold ingots under it instead of being forced to remove the wood before you can pick up the gold ingots.