## Context
- Adding RATING sort and filter capabilities.
- Fixing isEmpty/isNotEmpty filters
- Fixing combined view filters so it combines filters per field metadata
and not per filter id. This is more a product question but to me it does
not make sense to apply multiples filters on the same field IF the
operations is wrapped in a AND. If at some point we want to put a OR
instead then that would make more sense
Weiko
efd932e99b