Redesign Application Search

Summary: This moves aphront-side-nav to use same table css display as profile nav. Slightly less code to support. Cleans up AppSearch UI, think I've gotten all the edge cases here, but bang on it, can hold until after release cut.

Test Plan: Config, Maniphest, Differential, Diffusion, Home.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16346