Don't trigger undo listeners on file load

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34130 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3392 XYTable update 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34131 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e