Make "Edit Query" a more visible button in ApplicationSearch

Summary: Ref T2625. See disucssion in D6347.

Test Plan:
{F48515}
{F48516}
{F48517}
{F48518}

Reviewers: chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2625

Differential Revision: https://secure.phabricator.com/D6348