Populate string blocks with shadow blocks and not variable blocks (#1283)
Populate string blocks with shadow blocks and not variable blocks (#1283)


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