Please tell me you are not just dragging these always-on-top windows to the gray area and considering that docked?

Just kidding, there must be something I am missing here.
I may be going out on a limb here, but everything I have seen tells me that area is simply screen real-estate which you can use to move windows for temporary usage. No permanent docking at this time.
Yeah, I spent about 15 minutes trying to dock various windows but couldn't get any to stick. When I would exit BIAB they would, of course, disappear and, again of course, they did not load with my saved songs. Arg. Just...arg!