Zabbix

.......... [DEV-4740] fixed Selenium tests after the element that represented the flexible textarea was re-designed

* commit '6a584c7b3ba7c1c4e04ac095f3c6aa4f897e3257':
  .......... [DEV-4740] removed outdated failing scenario and replaced it with deleting macro by filling its values with empty string
  .......... [DEV-4740] added sleep for 1 seconds for debuging purposes
  .......... [DEV-4740] fixed the last part of tests that were failing not due to issues in frontend
  .......... [DEV-4740] fixed another part of failing Selenium tests
  .......... [DEV-4740] fixed a couple of more failing tests
  .......... [DEV-4740] fixed obtaining value of macro related columns in item test dialog
  .......... [DEV-4740] changed the textarea element to interact with by Selenium framework
  .......... [DEV-4740] fixed a couple of more places where the textarea field was located incorrectly
  .......... [DEV-4740] added the new type of textarea element to framework method that retrives the input element from container