set field to protected (used in extended class)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31248 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
some changes in web font-size update

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31249 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e