While editing a task, if I need to move the task to a different list and convert it into a "subtasks of" a task from the drop down list of all tasks under that list, it would be helpful to have an option to Filter out completed subtasks from the drop down list since people would rarely create new subtasks under closed/completed tasks and the drop down list can get very long/cluttered when scrolling down a large number of competed tasks that are combined with no progress and in progress tasks