[Redesign] Add Show/Hide functions to PHUIObjectBoxView

Summary: Ref T8099, adds 'show/hide' functions to PHUIObjectBoxView, rolls them out in Application Search for trial.

Test Plan:
Test doing a couple searches in Projects, Audit, etc. Seems to work ok. Design might need more?

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D13027