added quit option in notif in external.js
added quit option in notif in external.js

sharidas/core,owncloud/core,owncloud/core,sharidas/core,sharidas/core,sharidas/core,pollopolea/core,owncloud/core,owncloud/core,sharidas/core,pollopolea/core,owncloud/core,phil-davis/core,pollopolea/core,pollopolea/core,pollopolea/core