#3882 StatisticsCalculatorW porting

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31005 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3882 StatisticsCalculatorW events added

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31006 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3947 panel updates when changing texts or objects.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31007 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e