Better wording for cancelling/reinstating recurring events
Summary: Fixes T10744
Test Plan: Create recurring event, cancel one instance, cancel the parent event, reinstate event. Wording in the reinstating dialog should be clear about reinstating only instances that haven't been individually cancelled.
Reviewers: chad, epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T10744
Differential Revision: https://secure.phabricator.com/D15770