Fix warning labels for blocks (#2476)
Fix warning labels for blocks (#2476)


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