Fix for #4517 (desktop)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36001 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.322.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36002 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e