Nuxeo Seam should not display "Transaction Failed" in case of rollback

By default, Seam always display a "Transaction Failed" message.

Inside Nuxeo, this may be confusing since a listener (or any other processing) could do some check prior to commit and rollback the transaction.

In these cases, Nuxeo normally bubbles a RecoverableClientException that will then be displayed in Nuxeo UI.

A typical example is the QuotaExceededException

This task will require to do some changes directly inside of Seam.