Make sure the win version of Touch works nicely with touch events.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24792 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] Ggb2Giac improvements

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24793 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e