At every Zabbix release the Problems filter is added with new options and fields, getting very cumbersome and difficult to manage for unexperienced users.

Here are some usability suggestions to simplify the filter:

1. The meaning of selector [Recent problems|Problems|History] looks unclear to many users: consider replacing it with [Current|Recent|All problems] for a more immediate comprehension.
2. Replace the Severity checkboxes with a compact selector
3. Group similar options and:
   use Show label for filtering options
   use Display label for visualisation options
4. Replace Age less than label with a simpler Max days and remove checkbox: an empty field will just mean "do not filter".
5. Rename "Tag display priority" to "Tag display order"

Please see also attached mockups.