[Fix]Search radio button hide delay

[vchib1]

📝 Description

• Fixed radio button delayed animation when hiding search engines.
• Reduced radio toggle size to 16px for more cleaner UI.

📸 Screenshots / 📹 Videos

New.Tab.Mozilla.Firefox.2025-02-27.15-07-54.mp4

🔗 Related Issues

• Closes #<issue_number>
• Related to #<issue_number> (optional)

✅ Checklist

• I have read and followed the Contributing Guidelines.
• I have tested my changes by installing them as an extension (not just running via localhost) to ensure it builds, installs, and works as expected.
• I have tested these changes in at least Chrome and Firefox (other browsers if applicable).
• Attached visual evidence of changes (screenshots or videos) if applicable.

[prem-k-r]

Radio buttons size seems too small to me

[vchib1]

I think their size should be close to the height of the text. The default size looks way bigger to me.

[prem-k-r]

I'd suggest something like:

[prem-k-r]

Thank you