R1:13e959286c63

[Redesign] Persisent an open form when actively running queries

Summary: Ref T8099, Adds ability to set hidden form open, which leaves form open on searches and moves anchor point.

Test Plan: Run saved searches, advanced searches, and searches from main search ui.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D13308