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:
            ifrealname = i['interface_name'].split(':')[0]
            # Convert rate in bps ( to be able to compare to interface speed)
            bps_rx = int(i['rx'] // i['time_since_update'] * 8)
            bps_tx = int(i['tx'] // i['time_since_update'] * 8)
            # Decorate the bitrate with the configuration file thresolds
            alert_rx = self.get_alert(bps_rx, header=ifrealname + '_rx')
            alert_tx = self.get_alert(bps_tx, header=ifrealname + '_tx')
            # If nothing is define in the configuration file...
            # ... then use the interface speed (not available on all systems)
            if alert_rx == 'DEFAULT' and 'speed' in i and i['speed'] != 0:
                alert_rx = self.get_alert(current=bps_rx,
                                          maximum=i['speed'],
                                          header='rx')
            if alert_tx == 'DEFAULT' and 'speed' in i and i['speed'] != 0:
                alert_tx = self.get_alert(current=bps_tx,
                                          maximum=i['speed'],
                                          header='tx')
            # then decorates
            self.views[i[self.get_key()]]['rx']['decoration'] = alert_rx
            self.views[i[self.get_key()]]['tx']['decoration'] = alert_tx