Modernize Macro application
Summary: Adds feed, email, notifications, comments, partial editing, subscriptions, enable/disable, flags and crumbs to Macro.
Test Plan:
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Reviewers: vrana, btrahan, chad
Reviewed By: vrana
CC: aran
Maniphest Tasks: T2157, T175, T2104
Differential Revision: https://secure.phabricator.com/D4141