fix: geo panel issue

[islxyqwe]

1. fixed the geoKey won't be saved when geoData not set.
   
2. change the default World Countries data.
3. added the preview when selecting preset geo data.
   
   

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
graphic-walker	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 26, 2024 8:58am

[github-actions]

Risk Level 2 - /home/runner/work/graphic-walker/graphic-walker/packages/graphic-walker/src/components/leafletRenderer/geoConfigPanel.tsx

The code changes in this file are mostly additions of new features and minor modifications. There are no apparent bugs or security issues. However, there are a few areas where the code could be improved for readability and maintainability.

1. Use of magic numbers: The numbers -1 and -2 are used in several places in the code. It would be better to replace these with named constants to improve readability.

2. Error handling: In the handleSubmit function, there is a try-catch block where the error is simply logged to the console. It would be better to handle the error in a more user-friendly way, such as showing an error message to the user.

3. Code duplication: The code to set showGeoJSONConfigPanel to false is duplicated in several places. This could be extracted into a separate function to reduce duplication.

Example code snippet for the third point:

const closeGeoJSONConfigPanel = () => {
    vizStore.setShowGeoJSONConfigPanel(false);
};

// Then replace all instances of `vizStore.setShowGeoJSONConfigPanel(false);` with `closeGeoJSONConfigPanel();`

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