Contain fallout from overheating feed queries on user profile pages
Summary: Fixes T13349. If the user profile page feed query overheats, it currently takes the whole page with it. Contain the blast to a smaller radius.
Test Plan:
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13349
Differential Revision: https://secure.phabricator.com/D20678