This widget is pretty useless as the error view script can to it's
job. Interestingly nobody missed it, even the render() call was wrong.
I guess we will remove this soon, but for now it's fixed. Looks ugly,
but works.
This will make the code of the ConfigController way easier, as messages can be
send from everywhere and there is no need to consider consquences of
redirections.
refs #5100
Store messages in the current user session to be able to fetch messages from
other controllers, so that the use can be redirected back to the index, instead
of staying in the original action
refs #5100
Eric Lippmann
Alexander Klimov
Johannes Meyer
Thomas Gelf
Matthias Jentsch