Added support for keeping also the unprocessed Solr index fields when...

Added support for keeping also the unprocessed Solr index fields when processing hierarchical facets.

module/VuFind/src/VuFind/Search/Solr/HierarchicalFacetListener.php

@@ -197,6 +197,8 @@ class HierarchicalFacetListener
                 if (!isset($fields[$facetName])) {
                     continue;
                 }
+                // Keep the original data too
+                $fields["__unprocessed_$facetName"] = $fields[$facetName];
                 if (is_array($fields[$facetName])) {
                     // If full facet display style is used, discard all but the
                     // most significant value