R1:a6f018210466

Fix an issue where repositories with hyphens could sort improperly in typeaheads

Summary: Fixes T12894. See that task for discussion.

Test Plan:
- Created repositories `abcdef`, then `abcdef-a` through `abcdef-f`.
- Before patch, awkward sort order.
- After patch, query for `abcdef` hits `abcdef` first.
- See T12894 for details and screenshots.

Reviewers: chad, amckinley

Reviewed By: chad

Maniphest Tasks: T12894

Differential Revision: https://secure.phabricator.com/D18179