Mailing list dropdown filters within Subscriber Import does not work

When importing a mailing list, it’s not possible to use the search feature to filter/find an existing list. From what I’ve gathered so far, the SelectAdapter’s matcher method compares the search term with data.text which is an empty string. However, the list option is stored in data.name.

Since this code is from the Select2 module, it looks like the real issue is that the options passed to initialize that control are improperly structured. Those values are stored in window.mailpoetSegments. That is apparently created as an inline script in the PHP output.

I would be happy to submit a pull request with a patch if there is a source repository available.