Remove growl style messages

The growl style messages are generally unhelpful for developers. Any errors should persist and not fade away. I think this is a space you don't want to get into considering how much customization can be needed for such a behavior.

If one wants growl style status, they can easily install Purr Messages module. https://drupal.org/project/purr_messages

I do think it would be useful for us to provide a nice theme override for the Purr Messages, however, that seems like something Ember Support could handle since the Purr Messages persist both on the front and back end.