R1:090252a89e2b

Clean up Macro view page

Summary: Sets a header icon, makes "Details" not show if empty, simplifies title.

Test Plan: Review a few Macro pages for changes with and without audio.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15406