Zabbix

..F....... [ZBXNEXT-6194] simplifed maintenance form by union all tabs to one form

* commit '3a8c72d8261605af45230b0e0f0ee94510a7970e':
  ..F....... [ZBXNEXT-6194] fixed form submit; fixed incorrect buttons
  .......... [ZBXNEXT-6194] fixed Selenium test
  ..F....... [ZBXNEXT-6194] simplifed maintenance form by union all tabs to one form