Zabbix

.......... [DEV-1828] refactored title and header functions for page

Merge in ZBX/zabbix from feature/DEV-1828-5.0 to release/5.0

* commit '4fdc0aef10275a3bcdb5217d2bb2c1c5bef19f6a':
  .......... [DEV-1828] style mirco fix
  .......... [DEV-1828] fixed function naming
  .......... [DEV-1828] refactored assertTitle and assertHeader functions