Please just mark objects that do not have any use in the game as "junk". I'm tired of holding onto trash in case it might actually be useful.
Make the take-all button take everything in a container except junk.
Make the left-alt button only highlight containers that have non-junk items in them.
Put an option to hide junk items in containers, so you don't even see them. Better yet, put a slider to hide junk-items below a certain gp value.
Put a button to auto-sell all junk to vendors.
That's all.