It would be nice to be able to filter the trigger status the same way that dashboard allow us: from certain hostgroups (include and exclude), with/without/both acknowledgment.
We should keep the custom filter of X last events (mentioned as "lines").

Right now we can only filter by hostgroup (no exclude allowed), and no ack status considered.

Relevant current documentation:
https://www.zabbix.com/documentation/2.4/manual/config/visualisation/screens
https://www.zabbix.com/documentation/2.4/manual/web_interface/frontend_sections/monitoring/dashboard --> Dashboard filter