fixed room mgmt and recorder mgmt basically working

src/main.ts

@@ -72,6 +72,12 @@ Vue.use(VueMoment);
 
 Vue.config.productionTip = false;
 
+
+// @ts-ignore
+String.prototype.isEmpty = function() {
+    return (this.length === 0 || !this.trim());
+};
+
 new Vue({
     i18n,
     router,