Undo-redo won't clear the global listeners. (#4077)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31814 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4080: geogebraMap added; basic buggy support (unsupported things denoted by #, there are also other things unsupported)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31815 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4080: not everything can be written into comment!

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31817 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e