🧹 Major cleanup and modernization:
• Removed vendors/iCheck/ directory completely
• Eliminated iCheck CSS and JavaScript references from map.html
• Replaced iCheck jQuery initialization with CSS-only styling
• Added modern flat green checkbox/radio styling to custom.scss
• Updated README_CN.md to remove iCheck from scripts list
Benefits:
✅ Reduced vendor dependencies
✅ Smaller bundle size (removed 4.8KB iCheck + 1.3KB CSS)
✅ Modern CSS-only solution with same visual appearance
✅ Better performance (no JavaScript initialization needed)
✅ Maintains backward compatibility with existing 'flat' classes
The new CSS styling provides identical visual appearance to the original
iCheck flat green theme but without any JavaScript dependencies.