preload icon font in test page
preload icon font in test page

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