anchor.diff:        $light.click(() => cd.setReviewData(version, id, groupId, avatarName, avatarIndex, index-1, index));
         cd.setupTrafficLightTip($light, version, id, avatarIndex, index-1, index);
         updateCountData(event);
  +      counts.lastLight = event;
       }
       wasIndex(index);
     };
  
positive.code:     }).text(total);
    };
  
    const lastEventColour = () => {
      const last = counts.lastEvent;
      return last ? last.colour : '';
    };
  
  
negative.code:   const totalCount = () => {
      const total = counts.red + counts.amber + counts.green + counts.timed_out;
      return $('<div>', {
        'class': `traffic-light-count ${lastColour()}`,
        'data-tip': 'traffic_light_count',
        'data-red-count': counts.red,
        'data-amber-count': counts.amber,
  