Provide ordering options in Diffusion application search
Summary: Fixes T2298. Allows repositories to be ordered by name, callsign, commit, or date created. Slightly messy because of cursor paging.
Test Plan: Sorted commits.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2298
Differential Revision: https://secure.phabricator.com/D6919