Zabbix

A......... [ZBXNEXT-1583] Update API for handling new popup and screen functionality: 
- graph.get: Implement "selectGraphDiscovery" option which adds data from "graph_discovery" table.
- host.get: Implement "with_discovery_rules" option for selecting only hosts with discovery rules.
- hostgroup.get: Implement "with_discovery_rules" option for selecting only host groups with hosts having discovery rules.
- itemprototype.get: Implement "selectGroups" option which adds data from.
- screenitem: Add SCREEN_RESOURCE_LLD_GRAPH and SCREEN_RESOURCE_LLD_SIMPLE_GRAPH as known resource types.