R1:18e8d9a45265

Make the Phriction "History" view more aware of drafts

Summary: Ref T13077. Updates the "History" view to be slightly better organized and draft-aware.

Test Plan: Viewed page history in Phriction.

Reviewers: amckinley

Maniphest Tasks: T13077

Differential Revision: https://secure.phabricator.com/D19626