Move more rendering into SearchEngines for panels

Summary: Ref T4986. Getting closer. Nothing out of the ordinary in this group.

Test Plan:
For each application:

  - Viewed the normal search results.
  - Created a panel version and viewed it.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4986

Differential Revision: https://secure.phabricator.com/D9024