huey: Internal maintenance specification

This is another pass-through method. The reference source for the current background color is in the ColorReadout widget. See Section 16.5, “ColorReadout.bgColor(): Return the current background color”.

# - - -   A d j u s t e r . b g C o l o r

    def bgColor ( self ):
        """Return self's current background color.
        """
        return  self.__colorReadout.bgColor()