Update centerOnBlock blockly dts (#4929)
Update centerOnBlock blockly dts (#4929)


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