Zabbix

..F....... [ZBX-18803] fixed test item form ignoring empty status code input

* commit 'd4dd9142fd24d5b82c537035e7069ac209217999':
  ..F....... [ZBX-18803] added explanatory comment; reverted default value change
  ..F....... [ZBX-18803] fixed coding style
  .D........ [ZBX-18803] added change log entry
  ..F....... [ZBX-18803] fixed test item form ignoring empty status code input