Using custom status as Completed

Originally clearflask has a builtin completed status in roadmap task category, but if I delete it and use any other custom status as completed, then the mechanism "completed tasks can be added to announcement on next page" will break because announcement management does not know which status is "completed", so it will mistakely show tasks that can be linked to but with wrong status. I think you may want to add a config to setup a "completed" status just as the "entry status".