Update stats views.

def update_views(self):
        """Update stats views."""
        # Call the father's method
        super(Plugin, self).update_views()

        # Add specifics informations
        # Alert
        for i in self.stats:
            self.views[i[self.get_key()]]['used']['decoration'] = self.get_alert(
                i['used'], maximum=i['size'], header=i['mnt_point'])