Refresh selection area in case scene was resized/scaled.
        This happens e.g. when switching from Signal View to Quad Demod view
        :return:

def refresh_selection_area(self):
        """
        Refresh selection area in case scene was resized/scaled.
        This happens e.g. when switching from Signal View to Quad Demod view
        :return:
        """
        self.__set_selection_area(x=self.selection_area.x, y=self.selection_area.y,
                                  w=self.selection_area.width, h=self.selection_area.height)