The linked branch prevents windows to be dragged under the panel by dragging on the title bar. In case a window should still end up under the panel (might happen on alt+drag eventually as commnt #3 points out) it will be positioned below the panel when it's closed and reopened. Except from the not yet supported alt+drag in unity8, this seems to reflect unity7's behavior.
The linked branch prevents windows to be dragged under the panel by dragging on the title bar. In case a window should still end up under the panel (might happen on alt+drag eventually as commnt #3 points out) it will be positioned below the panel when it's closed and reopened. Except from the not yet supported alt+drag in unity8, this seems to reflect unity7's behavior.