many times a day to create a high-priority highest-priority items into a separate list that I can then manipulate independently of the original item, or to put a single item into two categories. I would propose one minor improvement. You already have an option to “close the linked tasks, too” when I close one of the the items; but there are many times I would like to delete all the linked items (so I don’t end up with tons of closed items). Can you add a “delete the linked tasks, too” option?
Charles Heckscher