You're right - there is currently no way to sort.

We're toying with some ideas on this front, and we're thinking that a "Sort to match summary graph" option would achieve what you're after (since that's one of the options you suggest), but it would not automatically update as the upper graph's order changed. Is that OK? If we allowed you to sort it at any time and then that sort order stuck - even after the upper graph was resorted to some *other* order, is that what you would expect to happen?

Thanks!