Summary:
Fixes T6906.
I found the code in `behavior-search-typeahead.js` that was throwing away the closedness-detction work done in `Prejab.js::transformDatasourceResults`. Modified it to re-add the correct class name to the `phabricator-main-search-typeahead-result` elements.
Then I found some CSS in `typeahead-browse.css` and completely flailed around until realizing that particular CSS only gets loaded when hitting the typeahead endpoint directly. Copied the relevant bit of CSS over to `main-menu-view.css` (but maybe it should be removed from `typeahead-browse.css`?).
This is my first JS/CSS change, so please don't assume I did anything right.
Test Plan: {F4975800}
Reviewers: #blessed_reviewers, chad
Reviewed By: #blessed_reviewers, chad
Subscribers: epriestley
Maniphest Tasks: T6906
Differential Revision: https://secure.phabricator.com/D18017