Fix CSS for Virtual Collection Builder
diff --git a/dev/js/src/vc/docgroup.js b/dev/js/src/vc/docgroup.js
index 5e5f010..0db4b4c 100644
--- a/dev/js/src/vc/docgroup.js
+++ b/dev/js/src/vc/docgroup.js
@@ -12,6 +12,8 @@
 
   var _validGroupOpRE = new RegExp("^(?:and|or)$");
 
+  var loc = KorAP.Locale;
+
   var docGroupClass = {
     _ldType : "docGroup",