fixed help css

Change-Id: I5b967429994b6b28fbbd5f4205cbad4f1f292c6c
Reviewed-on: http://gerrit.esdi-community.eu/3204
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>