Please, please add the ability to drag tracks around in the Renumbering Dialog.
This would be much faster than using the up and down arrow buttons.
Sure this wouldn't make a big difference for the occasional use of the Renumbering Dialog, but some of us have many albums (in my case live shows) we need to rearrange the track orders of.
BTW... Renumbering is called Auto-Numberingin the Hot Key Assignments Dialog.