Steps to reproduce:
1. Go to a) Systems->Jobs, b) Systems->Servers and c) Systems->Services
2. Try to apply filters
Although the filters were originally available for those pages, too, the filters were at some point of time simply "hidden" by commenting the respective line in the front-end code. The reason was that the backend implementation was buggy and no-one found time to fix it.
Filters should work as on any page in the admin ui.
Workaround (if any):
should be reviewed and merged first