feature request #9211
Handle source(s) for Classification
In #6581 we replaced reference links by sources (e.g. for SingleSourcedEntityBase). Classification is already IdentifiableEntity/SourcedEntityBase and therefore has already multiple sources. So we need to discuss how to unify these two possibilities to add source(s) to a classification.
Probably we have to move the existing source to the set of sources and remove the possibility to define a single source.
For this we need a possibility in TaxEditor to edit the sources for Classifications which is currently not possible.
This ticket should include to remove Classification.source.