Improve browsability of Projects query
Summary:
Ref T5750. Same deal as D12427, but for projects.
(As before, mostly making the empty/browse view work instead of return nothing.)
Test Plan:
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5750
Differential Revision: https://secure.phabricator.com/D12428