Zabbix

.......... [DEV-2296] added screenshot cheks for pages with draggable object

Merge in ZBX/zabbix from feature/DEV-2296-5.0 to release/5.0

* commit '44e4b3bc764f17f982c2e6c84940584611628c8c':
  .......... [DEV-2296] fixed screenshot tests for map, graph and web form
  .......... [DEV-2296] various fixes
  .......... [DEV-2296] resolved conflict
  .......... [DEV-2296] added screenshot check for mass update; icon mapping
  .......... [DEV-2296] removed comment
  .......... [DEV-2296] added map navigation tree element screenshot
  .......... [DEV-2296] style and comments fixes
  .......... [DEV-2296] added draggable object screenshot tests