Updates the remove enabled baesd on the current number of line widgets.

def updateRemoveEnabled( self ):
        """
        Updates the remove enabled baesd on the current number of line widgets.
        """
        lineWidgets = self.lineWidgets()
        count       = len(lineWidgets)
        state       = self.minimumCount() < count
        
        for widget in lineWidgets:
            widget.setRemoveEnabled(state)