R1:6084b7a20160

Update Owners for PHUITwoColumn

Summary: Clean up owners a bit, move to two columns.

Test Plan:
Review a package, edit paths, remove all paths. Archive.

{F1139351}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15388