Is it possible to vertically stack tool windows when docking them on one side using the new MVVM-friendly setup? For example, I have 2 tool windows. I would like to dock them both on the left side of the dock site, but the first should docked in the upper part of the left side and the other at the bottom of the left side. In the legacy docking product, we have accomplished this with some code based on your MVVM docking behavior example. We would like to use the new MVVM friendly functionality for this if possible.