avoid scrollbars in browseHeader for tablets and MacBooks

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36791 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
avoid scrollbars in LanguageGui-Header for tablets and MacBooks

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36792 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e