Fix plugin demo

Change-Id: Ib0840741b629b2e21ebc58bee01d185dfc48184f
diff --git a/dev/demo/plugin-serverdemo.js b/dev/demo/plugin-serverdemo.js
index 9b05ce0..171e9de 100644
--- a/dev/demo/plugin-serverdemo.js
+++ b/dev/demo/plugin-serverdemo.js
@@ -18,6 +18,11 @@
     'onClick' : {
       'action' : 'addWidget',
       'template' : 'http://localhost:3003/demo/plugin-client.html',
+      "permissions": [
+        "forms",
+        "scripts",
+        "downloads"
+      ],
     }
   },{
     'panel' : 'result',