DIsplay appropriate file extension in the import dialog (#2397)
DIsplay appropriate file extension in the import dialog (#2397)


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