Zabbix

..F....... [DEV-4580] fixed backend validator to remove value when all validations are skipped by when rules

* commit 'bb6466f934b95ff87da822b43ebfe7aab6d2005c':
  .......... [DEV-4580] added missing waitUntilVisible
  .......... [DEV-4580] fixed accidentally discovered dependency and missing waitUntilVisible in testLanguages test
  ..F....... [DEV-4580] removed invalid validation for valuemap
  ..F....... [DEV-4580] fixed getting value map init rules
  ..F....... [DEV-4580] fixed item preprocessing with type SNMP walk value rule
  ..F....... [DEV-4580] fixed item general and preprocessing rules. Fixed value map rules usage for hosts and template
  ..F....... [DEV-4580] fixed backend validator to remove value when all validations are skipped by when rules. Fixed validation rules for field tags in Host, Item, Item Prototype, Template, Trigger and Trigger prototype edit and create controllers.