Feature request: Handle orientation change

[w3ggy]

Right now during the tutorial, you can't rotate the device because at least _targetPosition in the AnimatedFocusLight stateful widget updates only after startup or changing the current tutorial page. This item contains the size of the focused widget and renders it correctly.

I didn't find an easy way to fix it on production.

[RafaelBarbosatec]

So this really is a problem. I don't have in mind how to solve this for now. This package does not support screen rotation at the time the tutorial started. I recommend you lock the screen rotation in the tutorial.