Swap feature for Unique tab

It would be useful to add a feature to the Unique tab that swaps an existing unique item with the new one. It would be much better to add a UI for this purpose, where I can compare two items and send one to the stash, and the other to my inventory. This feature can be made optional.

Or another alternative is to just swap uniques without a UI. But I think it should be noticeable for the player.

It is not very useful to find an "old" item among a thousand other uniques to compare with the "new" one.