R1:c72b753e5407

Move audit rendering into SearchEngine

Summary:
Ref T4986. Updates audit.

Slightly tweaks on method visibility.

Just used a HandleQuery since we have to rebuild the whole view thing otherwise; this is an unusual case.

Test Plan:
- Checked Audit.
- Checked Feed.
- Checked Slowvote.

{F151555}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4986

Differential Revision: https://secure.phabricator.com/D9011