Diffline 0.3.1

A faster sidebar: the list shows without waiting for background searches.

• The sidebar list shows sooner. It no longer waits for the background searches: the main search's results show as soon as GitHub answers, every minute as before. Recently merged or closed loads after the list, then every 10 minutes and right away when a pull request leaves the list; your teams' requests and Others you could review load about 5 seconds after the first list, then every 5 minutes. Refresh and changing a diffline.watch setting check everything at once, and background groups keep their rows and counts while they reload. diffline.watch.recentlyClosedDays now defaults to 3 days instead of 7. On a real account, the first list went from about 4.3 to 3.0 seconds (median of three).