Fix z index of grid picker tooltips on Edge (#4468) (#4471)
Fix z index of grid picker tooltips on Edge (#4468) (#4471)


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