Please put a confirmation for trashing an ongoing derby task.
It's so easy to make this mistake and there is no way to undo the faulty trash. You enter in the derby neighborhood and in the opened window your in progress task is displayed. Let's say you want to delete another task and you tap on this task, but for some reason the task isn't selected. You don't pay enough attention and... wow! your ongonig task is gone! It's happened to me today and, believe me, I was so... happy!