Only show member/watcher notes on Members page in Projects

Summary: Restricts the view of the membership privileges to just the Members page itself, and not other pages like Home/Details.

Test Plan: Test Home, Test Members, see correct layouts.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17896