Summary:
Ref T10747. When a user drops a ".ics" file or a bunch of ".ics" files into a calendar view, import the events.
(Possibly we should just do this if you drop ".ics" files into any application, but we can look at that later.)
Test Plan: Dropped some .ics files into calendar views, got imports.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16722
