Ticket #4660: currently, 3D objects which build upon the axes cannot be fully copied, but at least copying them does not give exception any more

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38054 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
5.0.49.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38055 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e