Dedupe DIRECTORY w/ Directory tab in directory header
Summary: the tab is a bit silly right next to DIRECTORY
Test Plan:
viewed phabricator with an admin account
- looks good on load
- clicked Categories and Items; looked good
viewed phabricator with a non-admin account
- looks good on load
- nothing else to click in the header
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, epriestley
Differential Revision: 1131