On the Manage Duplicates dialog box, the lower panel ('duplicates marked as hidden') remains the same height, regardless of how much stuff is in there or whether you expand the overall dialog box.
When you have many thousands of marked duplicates, it becomes very hard to use when you can only see seven at a time.
It would be great if this could be vertically expandable or if the whole Manage Duplicates dialog could be docked into a tab so I could play with it there.
Or could I somehow make a 'Marked Duplicates' playlist..? That would work for me if it's possible.