While I don't have this problem, what I really would like is a way to collapse back to parent. Often, I'm knee deep in a thread and forget what started it. I ha

While I don't have this problem, what I really would like is a way to collapse back to parent. Often, I'm knee deep in a thread and forget what started it. I have to scroll up, keeping a mental pin at the left margin to see when I get back to the parent.