Fix editing a Calendar import ICS URI
Before this change it was only possible to create a Calendar import ICS URI.
After this change it's possible to also edit already-existing elements.
This change fixes this specific exception when visiting similar pages:
/calendar/import/edit/5/ Argument 2 passed to PhabricatorCalendarImport::initializeNewCalendarImport() must be an instance of PhabricatorCalendarImportEngine, null given, called in phorge/src/applications/calendar/editor/PhabricatorCalendarImportEditEngine.php on line 45
Before this change it was only theorically possible to edit the name, policies, etc.
but not the URI.
This change also introduces the ability to edit the specific ICS URI,
in order to change legitimate parts of the URI, like the secret token.
I tested in my own installation with success lints.
To test, visit the Calendar, create an import ICS URI, and then try to edit it again.
It will work only after this change.
I was not able to conclude the "arc diff" since it tries to connect
to an unexisting database owned by root.
Reviewers: O1 Blessed Committers, avivey
Reviewed By: O1 Blessed Committers, avivey
Subscribers: avivey, Cigaryno, speck, tobiaswiese, Matthew
Maniphest Tasks: T15137
Differential Revision: https://we.phorge.it/D25061