BibMerge: `onclickSubmitButton` missing comma fix
BibMerge: `onclickSubmitButton` missing comma fix

* Fixes missing comma in `onclickSubmitButton`.  (PR #2230)

Reviewed-by: Tibor Simko <c7116e45300b163846dc01f3ed02116e3f8ef7a5@cern.ch>

tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio