Ticket #3300: the easier way to fix the problem in Web (the same could be done to Touch)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31960 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4103: zip-js: instead of changing existing method, make a copy

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31961 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e