implement fly to the closest location and then trigger popup info

[ntubrian]

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Summary

A clear and concise description of this pull request

• one little refactor of calculateHaversineDistance.js
  • The original function parameters lacked flexibility, so they were refactored to enhance usability
• implement fly to the closest location and then trigger popup info
  • The "近" button will only be shown when there is exactly one visible layer of the type 'circle'.

Type (Fill in "x" to check)

• Bug Fix
• New Feature

Checklist

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• Code linter has been run and issues have all been resolved
• The code has been thoroughly tested and no visible bugs have been introduced
• The pull request will completely resolve the issue(s) mentioned
• The pull request only resolves the issue(s) mentioned and nothing more

Additional context

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