handle mouse leave as well.
handle mouse leave as well.

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