Add a new field by cloning with + button. Expand/collapse the new field by clicking the field label (marc field name). The original (first) field expands/collapses. Patch corrects this bug in javascript.
Created attachment 3120 [details] [review] Patch
Additional observation: the removed code did no longer work, because the ? link was added recently to the marc loc page. This url in the cloned fields now does the expanding and collapsing of the right field. This behavior comes from just adjusting the onclick of the first link in the array and not testing it (in the old code). The new code tests the class of the link, restoring the correct behavior of both links.
Pushed, please test and mark resolved