In the desktop app (v 6.0.18) on Windows 10, I want to move (not copy) an item from the root of a group library to a subcollection of the same group library. I only want the item to appear in the subcollection, not in the root library. 'Show items from subcollections' is switched off, but I am still seeing the item in the root library after moving it (dragging to subcollection while holding Shift).