Make the currently selected round correct location marker popup styled more distinct

[ghost]

Have a more distinct and noticeable style for correct location marker's popup

• Bolder font weight
• Bigger font size
• Different bg color for popup

Alternatively, also update the marker icon style

• Slightly different shade of red
• Border color other than black
• Maybe a small transition animation when round is first selected, like a bit of slow icon size enlargement