ReOrdering Mastery Slots

For people who play a lot of Team Builder, and have all their masteries filled in for specific champions, you may find it annoying to scroll around and find the right mastery slot. I've been thinking about this idea for a while actually, and am surprised I've never seen anybody else talking about this. I think we should be able to click and drag (In our profile under Masteries), to move around and order the masteries from 1-20. That way we could put our most often played champions at the top, and can change it easily whenever we start using a different champion more. Sure we can already accomplish this by redoing our masteries under whichever number but that is very time consuming and I'm pretty sure nobody wants to spend their time doing that.

Anyone agree? Feel free to add your ideas below :)