Lower-level check to prevent JVM crash #4679

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37089 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removing accented letters


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37090 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
5.0.19.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37091 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e