Make more complex scenarios in the null check filter possible

[LosD]

Currently the null-check filter is all-or-nothing; either you specify that all selected columns must be non-null/non-empty or any selected columns must be non-null/non-empty for the record to be valid.

It would be an improvement if it was possible to specify subsets of fields that must be valid. Like "(A AND B AND C) AND (D OR E)". or "(A AND B AND C) OR (D AND E)".

That would simplify use cases like this one quite a bit, possibly even completely eliminating the need for multiple filters.