huey: Internal maintenance specification

# - - -   M e n u B a r . _ _ h e l p M o d e l S e l e c t o r

    def __helpModelSelector ( self ):
        """Help for selecting a color model.
        """
        self.__dialog ( 'Help: Selecting a color model',
            "A 'color model' is a way of describing a specific color as "
            "a set of three values from 0 and 255. Use the radiobuttons "
            "under 'Select a color model' to pick one of the color "
            "models." )