Add "Calendar Event" and "Pholio Mock" to quick create menu

Summary: Ref T3623. Also dropped "New" from everything, since the "Create a new:" label contextualizes that.

Test Plan: Clicked all the stuff in the menu.

Reviewers: chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T3623

Differential Revision: https://secure.phabricator.com/D8103