[TYPO3-mvc] Action runs several times according to the amount of same plugins

[Oberndörfer, Markus]

Thx Franz + Jonas,

I have just forgotten the persistAll() function of the dispatcher, which is now running properly in the action combined with the exit statement. 

Nevertheless I would like to make it according to one of your proposals. But the solution with the hidden page seems to be not the best solution for the integrators of the extension. 

Best regards
Markus