Fix Repository tool's missing app link

Summary:
the Repository tool is missing the standard application link
at the top. The reason is that PhabricatorRepositoryListController and
several other classes are inheriting from a wrong class.

Test Plan:
play with the application to make sure it is not breaking
other stuff.

Reviewed By: epriestley
Reviewers: epriestley
CC: jungejason, epriestley
Differential Revision: 70