Summary: Ref T2015. All the Drydock query classes share the application method; move it into a shared base class to slightly shrink the codebase.
Test Plan: Browsed query UIs.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2015
Differential Revision: https://secure.phabricator.com/D7837
