Need Planned For on Quality Task creation inline presentation
Accepted answer
I think what you get, when creating a quality task, is not an inline editor, it is a (OSLC) creation dialog from EWM. I believe this dialog is not editable. You would have to use EWM to perform the planning. When adding an existing item, you get the standard search dialog from EWM. You can see it is EWM, because the work item types are based on the types available in the associated EWM project area.
So, as far as I can tell, you can not edit these dialogs.
Comments
This is not the answer I was hoping for, but if editing this input dialog is not an option, then I will determine a workaround procedure to ensure Quality Tasks don't end up lost in no plans land.
You are aware that you can have EWM Query widgets on an ETM dashboard? You could try to query for work items that have a ETM link and are not planned for an iteration.