[TodoView] Use parents collection when creating a subtodo
Summary:
When creating a subtodo of an existing task, it should belong to the same collection.
Apparenly, there was a typo: parent collection was determined, but not passed to createIncidence call.
Just fix it.
Test Plan:
- Open KOrganizer todo list, select an existing todo
- Enter new todo description in the text widget below the list, press Ctrl+Enter
- (without patch) It asks for a collection despite attempting to create a sub-todo
- (with patch) A sub-todo gets created in the same collection
Reviewers: dvratil
Subscribers: kde-pim
Tags: KDE PIM
Differential Revision: https://phabricator.kde.org/D28434