So... Two things:

1. I couldn't figure out how to do what you were suggesting.
2. The sprints have all this additional data we're not showing, yet. Amongst other things, the sprint list should be ordered by start date. I figured it's easier right now to just refresh the sprints page rather than take the new sprint and figure out where it goes in the list.

I'm totally game for reworking that, but I'm thinking it's probably a better idea to land this and write up an issue for someone to fix later than to sit on it a few days until I have time to work it out.