It says not to post suggestions in development unless you can do the development for the enhancement.
So often, in scrolling through my library (especially with the mouse scroll wheel) I overshoot where I intend to go. For example, I've searched for an author who has a co-author plus a bunch of solo titles. The co-author falls alphabetically before the author, so I scroll down and often miss the highlight, or if I happen to hit the highlighted works and select one and then scroll with the wheel, I find it not easy to get back to where I was. Hence, a Back button.