Allow sorting of output fields in gs-aggregate

[anna-parker]

We use gs-aggregate when selecting clades to filter from, as the output is not sorted alphabetically the result is quite ugly: GenSpectrum/dashboards#302 (comment)

An alternative for pathogens with more clades would be to do sth similar as in the mutation filter where users can start typing and we offer a list of valid clade names.

[fengelniederhammer]

It is possible to sort the columns of gs-aggregate.

From the comment, I think you're referring to gs-text-input? We could indeed sort the values there.

It also already has an autocomplete functionality. If you start typing, only the matching options will show up.