Tutorial hint state cleanup for unplugged, reset state at each step (#5660)
Tutorial hint state cleanup for unplugged, reset state at each step (#5660)

* Tutorial hint state cleanup, reset state at each step

* Add check to see if frameElement exists (#5659)

* Add check to see if frameElement exists

* Added support for old urls/backwards compatibility

* Tutorial hint state cleanup, reset state at each step

Microsoft/pxt,switch-education/pxt,switch-education/pxt,Microsoft/pxt,Microsoft/pxt,switch-education/pxt,switch-education/pxt,Microsoft/pxt,Microsoft/pxt,switch-education/pxt