IOS Home screen UA issue (#1377)
IOS Home screen UA issue (#1377)

* Fixing user agent IOS home screen issue.

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