Clears out the actions for this menu and then loads the files.

def refresh( self ):
        """
        Clears out the actions for this menu and then loads the files.
        """
        self.clear()
        
        for i, filename in enumerate(self.filenames()):
            name   = '%i. %s' % (i+1, os.path.basename(filename))
            action = self.addAction(name)
            action.setData(wrapVariant(filename))