#3808: different handling of 3D vectors on serialization

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30365 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3882 things are moved up to common.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30366 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3882 tipo!  ( :-) ).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30367 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3882 still pulling up.....

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30368 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Simple check for big spheres

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30369 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Simple check for big spheres

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30370 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e