Zabbix

..F....... [DEV-2681] added attribute "aria-required" for Description field in Gauge widget

Merge in ZBX/zabbix from feature/DEV-2681-6.5 to master

* commit '16d2f7a392fcaa0218829fce59a570c2e107d536':
  .......... [DEV-2681] fixed Selenium test, updated Gauge widget in template dashboard
  ..F....... [DEV-2681] fixed asterisk on description field in gauge widget