R1:d0cdf1efdb31

When a repository is importing, show it on the list view

Summary: Fixes T9191. This is pretty fluff but doesn't hurt anything, I guess.

Test Plan: Viewed repository list, saw an importing repository get a little icon.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9191

Differential Revision: https://secure.phabricator.com/D14950