Distinguish between not yet registered and invalid appstore token

This is to avoid throwing errors

src/js/main.js

@@ -84,6 +84,7 @@ angular.module('Application').controller('MainController', ['$scope', '$route',
     // NOTE: this function is exported and called from the settings.js
     $scope.updateSubscriptionStatus = function () {
         Client.getSubscription(function (error, subscription) {
+            if (error && error.statusCode === 412) return; // ignore if not yet registered
             if (error) console.error(error);
 
             $scope.subscription = subscription;