[Feature Request] Automatic Date from Parent Task

[armaccloud]

When a task exists of multiple child tasks, often you'd want them use the same date/timespan as their parent.

In case the child datetime has to deviate, then the selection of the right datetime is not hindered by it already being populated by the parent.

[raimund-schluessler]

We could take over the due date from the parent task on creation of the subtask, assuming that the subtask should be finished latest together with the parent task.

But I am not sure if we should adjust the due date of the subtask later on, when one changes the due date of the parent task. We will not be able to keep it consistent when one uses another client anyway and it might be unwanted that the due date of the subtask changes when you change the parent task.