One way to do this is with our DragDropManager - handle the DragInitialize and DragOver events and move the settings pane inside a canvas. If you don't want the open/close button you can place a SettingsPaneView inside anything you want - popup, border, window and etc. and move its parent on DnD again.
I've attached a sample project demonstrating the first approach so could you please examine it and tell us if this is what you're looking for.
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