[BACKPORT] Cancelling the creation of a document as editor does not work

When creating a document as an editor and directly closing the document and discarding the changes. The dialog stays after clicking discard and the following error is logged

22.08.2012 11:12:15 WARN [org.hippoecm.frontend.observation.JcrListener.getEvents():619] Root node no longer exists: content/documents/hippogogreen/events/2012/08/asdfa/asdfa/hippogogreen:copyright
22.08.2012 11:12:15 WARN [org.hippoecm.frontend.observation.JcrListener.getEvents():619] Root node no longer exists: content/documents/hippogogreen/events/2012/08/asdfa/asdfa/hippogogreen:form
22.08.2012 11:12:15 WARN [org.hippoecm.frontend.observation.JcrListener.getEvents():619] Root node no longer exists: content/documents/hippogogreen/events/2012/08/asdfa/asdfa/hippogogreen:location

However, your changes are undone. So if you have entered a title for your document and you no longer want the document, normally you can just close the document and discard. Now the document should be removed, the same as when you are an administrator. Instead the dialog stays with no feedback and when you cancel the dialog it goes away. If you now close the document you will see that your added content is gone.
This is all reproducible in the gogreen