Copy repository status to a management panel

Summary: Ref T10748. Pretty straightforward. I'd like to put a little "!" icon in the menu if there's a warning/error eventually, but can deal with that latre.

Test Plan: {F1223096}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10748

Differential Revision: https://secure.phabricator.com/D15741