Don't show un-completeable results in people/project autocomplete
Summary:
Fixes T10285.
- If a result (like a milestone) has no primary hashtag, try to fill in a secondary hashtag.
- If we can't find any hashtag, don't return the result.
This produces these behaviors:
- By default, you can't autocomplete milestones.
- If you give one a hashtag, you can.
We might want to give milestones "special" hashtags eventually (like #xyz/33) but this fixes the confusing/broken behavior in the UI and we can wait for a better use case for letting you autocomplete milestones, I think.
Also, don't try to cycle hashtags when renaming milestones. This was a little inconsistent before.
Test Plan:
- Autocompleted normal projects.
- Autocompleted milestones with explicit hashtags.
- No autocomplete entry for milestones with no special hashtags.
- Used normal typeahead to get tag-less milestones to make sure I didn't break anything.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10285
Differential Revision: https://secure.phabricator.com/D15261