Some more problems / #1809

That's more a problem of Strange behavior of list, tree and grouped sorting (tasks), but we continued the discussion about the tree view etc. in the scope of this topic, too.
So I will explain the new problems in this context.

Process:

1. Added four new tasks to a project
2. Closed three of these tasks
3. Added a new folder to the project
4. Moved two closed and one open tasks to the new folder

=> Problems with the different views at the list of closed tasks

Problem situation:

• At the list of closed tasks I don't see the folder and its closed tasks in the

list view, tree view and grouped view (parent-task).

• I only see them in the grouped view ordered by status, prio or created_by.

The problems only occur with the closed tasks which are related to the folder.

There are no problems with the open task which is related to the folder or the third closed task which isn't related to the folder.