R1:038f5323c017

Allow Herald's "Reviewers" field to select project reviewers

Summary: The "Reviewers" condition in Differential Revision rules has the wrong typeahead and can't select projects, but should be able to.

Test Plan: {F79273}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D7526