Show Projects bucket unconditionally in repository summary screen

Summary: fixes T4753

Test Plan: looked at repository with projects, looked at repository with no projects

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: chad, epriestley, Korvin

Maniphest Tasks: T4753

Differential Revision: https://secure.phabricator.com/D8730