[BUGFIX] Add "Media" in CSS Bootstrap

Bootstrap is used in About Modules.

Resolves: #62791
Releases: master
Change-Id: Icebe4095367a0e14d7fbef40a74fe5fecc0df16c
Reviewed-on: http://review.typo3.org/34017
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>