properties files and related resources automatically updated from ggbtrans

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26236 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
intersect curves

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26237 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
make sure RandomElement[] works with empty lists

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26240 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e