Tidy up PhameBlogManage
Summary: Remove unneeded actions, fix archive controller, adds some icons. Ref T9897
Test Plan: Archive a blog, unarchive a blog
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T9897
Differential Revision: https://secure.phabricator.com/D14709