refs #23356 [finc] reverting/adapting change from #21622 - light box focus...

refs #23356 [finc] reverting/adapting change from #21622 - light box focus after close was not set properbly because origin setter was deleted on template update

themes/finc/js/lightbox.js

@@ -291,6 +291,8 @@ VuFind.register('lightbox', function Lightbox() {
       _lightboxTitle = $(this).data('lightbox-title') || false;
       _modalParams = $(this).data();
       VuFind.modal('show');
+      // Copied finc #17984
+      setOrigin($(this));
       ajax(obj);
       _currentUrl = this.href;
       return false;