Convert Macro to SearchFields

Summary: Ref T8441. Ref T7715. I'm primarily clearing callers to saveQueryOrder() so I can get rid of it.

Test Plan: Used all Macro search features.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7715, T8441

Differential Revision: https://secure.phabricator.com/D13194