Undo-redo for circle fixed on web too. (#4041)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31488 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3882 ProbabilityCalculator statable events added (not tested).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31489 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e