add localization to default project name

store.js

@@ -1393,7 +1393,7 @@ StageMorph.prototype.toXML = function (serializer) {
             '<blocks>%</blocks>' +
             '<variables>%</variables>' +
             '</project>',
-        (ide && ide.projectName) ? ide.projectName : 'Untitled',
+        (ide && ide.projectName) ? ide.projectName : localize('Untitled'),
         serializer.app,
         serializer.version,
         (ide && ide.projectNotes) ? ide.projectNotes : '',