[BUGFIX] Perform format.raw viewhelper on wizard description

To support special chars like &.

Resolves: #60746
Change-Id: Ib82e9d356936ecd8d54639a6bb202f60f6df5033
Reviewed-on: http://review.typo3.org/31952
Reviewed-by: Armin Ruediger Vieweg <armin@v.ieweg.de>
Tested-by: Armin Ruediger Vieweg <armin@v.ieweg.de>