render cards for functions without blocks. fix for #267
render cards for functions without blocks.
fix for #267

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