fixing built-in block search not coming up (#3141)
fixing built-in block search not coming up (#3141)


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