(fix #147) can now add multiple mail labels

UI/WebServerResources/js/Common/utils.js

@@ -353,3 +353,11 @@ function contrast(hex) {
     return 'white';
   }
 }
+
+function guid() {
+  function S4() {
+    return (((1+Math.random())*0x10000)|0).toString(16).substring(1); 
+  }
+  
+  return (S4() + S4() + "-" + S4() + "-4" + S4().substr(0,3) + "-" + S4() + "-" + S4() + S4() + S4()).toLowerCase();
+}