Creates a new menu with the given name.

def createMenu( self ):
        """
        Creates a new menu with the given name.
        """
        name, accepted = QInputDialog.getText( self,
                                               'Create Menu',
                                               'Name: ')
        
        if ( accepted ):
            self.addMenuItem(self.createMenuItem(name), 
                             self.uiMenuTREE.currentItem())