Fix bug with code card not hiding
Fix bug with code card not hiding

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