#3917 ImageCorners for web, it has icons but not the right ones

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30821 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Always export the same XML for macros; fixes #77

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30822 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for #3771 ([web] fixed drop-down lists not working).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30823 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e