Left nav should no longer offer to create Calendar event and create event page should no longer show left nav.
Summary: Closes T7934, Left nav should no longer offer to create Calendar event and create event page should no longer show left nav.
Test Plan: Open Calendar, left nav should be missing the Create Event option, create event, create view should no longer show left nav.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Maniphest Tasks: T7934
Differential Revision: https://secure.phabricator.com/D12638