Fallback choices become visible after reloading the story state

[smwhr]

Someone reported this issue a few years ago
https://github.com/y-lohse/inkjs/issues/912

It has been fixed today by this pull-request
https://github.com/y-lohse/inkjs/pull/1130

Looking at the relevant C# code, I see that isInvisibleDefault is not serialized either in here. So the behaviour must be identical and the same issue must happen.

I am not able to test it myself (don't have a C# env available atm), but copying the changes from the inkjs over should be fairly straightforward ! (@tvararu even included a test case that could be added in here if need be)