UI fix

src/footer.tmpl.html

@@ -1,6 +1,6 @@
 <md-toast role="alert" aria-relevant="all">
   <span class="md-toast-text" flex>{{ctrl.toastMessage}}</span>
-  <md-button ng-click="ctrl.goToUrl(ctrl.url)">
+  <md-button ng-click="ctrl.goToUrl(ctrl.url)" ng-if="ctrl.url">
       {{ctrl.buttonText}}
   </md-button>
 </md-toast>

src/styles/style.css

@@ -1,4 +1,5 @@
 html, body {
+	min-height: 500px;
   width: 600px;
 }