jarn.jsi18n uses the first matched catalog

[pgrunewald]

Hello,

I am under the impression, that jarn.jsi18n uses the first catalog it comes across for a particular domain and language. This is troublesome for my use case, where I am going to update an existing domain/language by just few entries. After checking the localStorage, I have noticed that jarn.jsi18n is purely using my small catalog and ignores the original one.

This behaviour is contrary to the usual Plone translation machinery, that takes every matching catalog into consideration.