Make dupes reference through drag & drop

From GS

Dunno if this is off topic, but dgpe chooses the reference in ways I don't find optimal as well, but the solution I'd have preferred, and would have found most intuitive, would be drag and drop re-referencing. If you decide to do drag and drop re-ordering, I'd suggest making it like finder, click on the name = drag, click on the empty part of the column = multiple select. also, so it's easy to target, I'd say that anything dropped on the reference or higher on the y axis than the reference becomes the reference, but anything dropped lower on the y axis than the reference does nothing. also if I knew how to code, I'd make it highlight the reference in red when it would be demoted by a drop. If any of that didn't make sense, feel free to e-mail me at segers (att) wnrmagic (dawt) com put dupeguru in the subject though.