Fix extra padding in online friends list border

Added missing value to friends.scss to fix additional 8px padding at bottom of friends list reported in issue #54 <img width="445" height="340" alt="Screenshot From 2025-11-10 11-48-20" src="https://github.com/user-attachments/assets/6ce2b0aa-cfbf-4b03-af08-6d6898f89215" />