Zabbix

..F....... [ZBX-18595] fixed wrong filtering for nested groups in monitoring problems page

Merge in ZBX/zabbix from feature/ZBX-18595-5.2 to release/5.2

* commit 'c1c78eba49401340220f3663b9d1f867ca8e9774':
  .......... [ZBX-18595] reverted 4dba80f3d05
  ..F....... [ZBX-18595] allow to select parent group
  ..F....... [ZBX-18595] fixed selecton an empty host group if child host groups have hosts
  ..F....... [ZBX-18595] fixed groupid being passed as string
  ..F....... [ZBX-18595] added missing empty array check
  ..F....... [ZBX-18595] coding style fix
  ..F....... [ZBX-18595] coding style fix
  .......... [ZBX-18595] added changelog
  ..F....... [ZBX-18595] fixed groupids and exclude_groupids did not include sub groups