How to reset focalPoint in GestureSettings to default behavior?

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Hi team,

I have a question regarding the focalPoint property in GestureSettings.

I can successfully override the gesture center by setting a specific focalPoint via:

```
await mapboxMap.gestures.updateSettings(
GestureSettings(
focalPoint: ScreenCoordinate(x: ..., y: ...),
),
);
```

However, I would like to temporarily set the focal point, and then revert back to the default behavior, where the zoom/rotate center follows the user's gesture center.

What is the correct way to reset focalPoint to its default gesture-centered behavior?

Any clarification or workaround would be greatly appreciated!

Thanks 🙏

Start with the GestureSettings.focalPoint property and gestures.updateSettings entry point named in the report. Check the API documentation or examples for how default gesture-centered behavior is represented; done means documenting a confirmed reset path or workaround.

Written by the indexing model from the issue text.