Use PHUIDocumentProView in Phame
Summary: Updates "View Post" to use PHUIDocumentViewPro, updates calls to newPage and other minor modernizations. Edit Page updated to show proper document display as well. Ref T9545
Test Plan:
Write a blog post, edit it.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T9545
Differential Revision: https://secure.phabricator.com/D14415