TYPO3 Core

Problem:
The current handling of the message queue for flashmessages happens in template.php and is quite unflexible.
Storing the messages in the user session is very performance intensive and it is not needed in all cases.

Solution:
Add a new class which handles the message queue and extend the flashmessages object by a parameter which configures whether the message is stored in the session (these messages will survive redirects) or store them in the messagequeue object (default)

(issue imported from #M12154)