SpinBox arrow key manipulation reorders item in Navigator

Using the arrow keys on a focused SpinBox will either add or substract the defined stepSize. When using the the modifier keys Qt.ControlModifier or Qt.ShiftModifier together with the arrow keys the stepSize is replaced with either minStepSize or maxStepSize.
When using Qt.ControlModifier && (Qt.Key_Up || Qt.Key_Down) it will not only change the value in the focused SpinBox, but will also reorder the selected item in the Navigator.