Zabbix

.......... [DEV-2703] refactored Selenium test and added workaround for multiselect reload

Merge in ZBX/zabbix from feature/DEV-2703-6.0 to release/6.0

* commit '9679f49d8edcea837490d2e8038eef2ba5ac3d12':
  .......... [DEV-2703] fixed objects names and styling
  .......... [DEV-2703] added dialogs closing and fixed test data
  .......... [DEV-2703] moved and refactored Selenium test
  .......... [DEV-2703] added workaround for overlay dialog reload after clearing data in multiselect