Check countries list before generating the GeoJSON for projects

[samshara]

Addresses:

• NS Overview > NS Activities: Error while changing language: Invalid LngLat latitude value: must be between -90 and 90 #834

This PR doesn't introduce:

• typos
• conflict markers
• unwanted comments
• temporary files, auto-generated files or secret keys
• console.log meant for debugging
• codegen errors

[changeset-bot]

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Latest commit: 28d913e

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