Fix double-menus in Herald transcripts

Summary: Fixes T2329. Adds crumbs and gets rid of the double-depth menus.

Test Plan: Looked at transcript list, test controller and transcript detail.

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Maniphest Tasks: T2329

Differential Revision: https://secure.phabricator.com/D4564