[TASK] fix margin of info message below filter box

Change-Id: Ifb8fbd8206d330cc71adaea035e7d4f8678db248
Reviewed-on: http://review.typo3.org/32525
Reviewed-by: Christian Zenker <typo3@xopn.de>
Tested-by: Christian Zenker <typo3@xopn.de>