[BUGFIX] optimizing CSS

optimizing CSS for the sending wizard

Resolves: #59744
Releases: 4.0
Change-Id: If65f3f1bc6f3dcda99feeb102e190aafccb940ee
Reviewed-on: http://review.typo3.org/33223
Reviewed-by: Ivan Dharma Kartolo <ivan.kartolo@gmail.com>
Tested-by: Ivan Dharma Kartolo <ivan.kartolo@gmail.com>