Projects - tokenize projects more aggressively with respect to '-'

Summary:
Fixes T5727. Updates the regexes to split on '-'. Also changes the editor such that tokens are updated by the larger search process. (Note this means we update this data more often then we need to - for every project transaction.)

Users will need to make an edit to a project -or- run `bin/search index "#project-tag"` to make this actually work.

Test Plan: Made "Frontend-Engineering", "Engineering", and "Backend-Enginering". They all showed up in the typeahead!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5727

Differential Revision: https://secure.phabricator.com/D10247