SE 5.3.0 beta 4: Scrolling in Settings

In many Windows apps, you can often click in a dead area of a window & that enables scrolling via Up/DownArrow. Also the Page keys, for that matter. There's been a lot of times I'd like to click in a dead area of Settings & then scroll with the Arrow keys. My only alternatives are Tab & mousing the little arrows at the ends of the scrollbar. And you know how I hate mousing. You could position this idea as conforming to standard Windows behavior. I mentioned this in #12087 but it's buried there. Let's get this its own discussion.