Make Diviner's "advanced search" a little less derp
Summary: Ref T988. This layout got mucked up a while ago, restore it to some semblance of sanity and give it a couple of basic search options.
Test Plan: Searched for stuff. Woooo~~
Reviewers: btrahan, chad
Reviewed By: chad
CC: aran
Maniphest Tasks: T988
Differential Revision: https://secure.phabricator.com/D8419