CAS styling, appCas is back

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23210 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fixed row header filling

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23211 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e