Add referTo per default to vc list

Change-Id: I7badcf7ba15036a8d54991959d28718016ae575c
diff --git a/dev/js/src/vc.js b/dev/js/src/vc.js
index b0ebc44..07731c7 100644
--- a/dev/js/src/vc.js
+++ b/dev/js/src/vc.js
@@ -142,8 +142,17 @@
         KorAP._overrideStyles = true;
       };
 
+      var l;
+      if (keyList) {
+         l = keyList.slice();
+        l.unshift(['referTo', 'ref']);
+      }
+      else {
+        l = [['referTo', 'ref']];
+      }
+
       // Create key menu
-      KorAP._vcKeyMenu = menuClass.create(keyList);
+      KorAP._vcKeyMenu = menuClass.create(l);
       KorAP._vcKeyMenu.limit(6);
 
       return this;