Improve browsability of People query

Summary: Ref T5750. Fix this query so it works better with the browse view. In particular, make it return results before the user types a query.

Test Plan:

• Used a people tokenizer.
• Used global search tokenizer to search for people.
• Ran new version of query in production to make sure it wasn't crazy.
• Browsed through results in browse view.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5750

Differential Revision: https://secure.phabricator.com/D12427