Cancelled recurring events should propogate to real child events
Summary: Ref T8371, Cancelled recurring events should propogate to real child events
Test Plan: Create recurring event, create and exception to a ghost event, cancel recurring event, real ghost event should be treated as cancelled while the recurring event remains cancelled.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Maniphest Tasks: T8371
Differential Revision: https://secure.phabricator.com/D13121