SVG serialization is broken on IE, don't cache tutorial steps on IE. (#4264)
SVG serialization is broken on IE, don't cache tutorial steps on IE. (#4264)


Microsoft/pxt,switch-education/pxt,switch-education/pxt,playi/pxt,Microsoft/pxt,playi/pxt,switch-education/pxt,switch-education/pxt,switchinnovations/pxt,switchinnovations/pxt,Microsoft/pxt,switch-education/pxt,Microsoft/pxt,switchinnovations/pxt,switchinnovations/pxt,playi/pxt,playi/pxt,Microsoft/pxt