Display of multiple hippo:mirror field in edit mode broken

I install the FAQ feature using Essentials, and edit the faq/About FAQ faqlistdocument. The hippo:mirror fields "Faq documents" display inline rather than one link per row. This looks ugly and confusing.

(was: )
The add button should be disabled if nothing is selected. See second screenshot.
I expect each document to get its own row. See third screenshot.

The lay-out can be improved, see first and second screenshot.