Fix bug in blocklyloader where it's referencing the wrong index (#3298)
Fix bug in blocklyloader where it's referencing the wrong index (#3298)


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