Multiple search fields in typeahead

[giovanni-bertoncelli]

Is your feature request related to a problem? Please describe.

When using typeahead with a complex object it may be useful to choose in which fields search for matches. As for now complex objects typeahead requires the usage of [typeaheadOptionField] that is quite useless without having a chance to choose where to search.

Describe the solution you'd like

I'd like an input like [typeaheadSearchFields] that accepts one or more strings of the fields I want the typeahead to search between. The related values would be concatenated and the matchers should search inside that resulting string.

Describe alternatives you've considered

All solutions that I found out were way too much complicated for this. I think [typeaheadOptionField] is quite useless without this other feature.

Additional context

Already proposed here: #2563