Fix: IE10 bug - DOCTYPE, IE=Edge, let -> var

src/web/module/maestro_setup.html

@@ -1,17 +1,17 @@
 <script>
 
-let isChangedIDName = false;
-let isAvailableIDName = false;
-let registeredMaestroIDName = "";
-let registeredEmail = "";
-let registeredPassword = "";
-let registeredAccountType = -1;
+var isChangedIDName = false;
+var isAvailableIDName = false;
+var registeredMaestroIDName = "";
+var registeredEmail = "";
+var registeredPassword = "";
+var registeredAccountType = -1;
 
-let newMaestroIDName = "";
-let newEmail = "";
+var newMaestroIDName = "";
+var newEmail = "";
 
-let newPassword = "";
-let newPasswordVerify = "";
+var newPassword = "";
+var newPasswordVerify = "";
 
 
 $(document).ready(function() {