[devtools] Remove title from preferences (#85698)
The heading sections in DevTools regressed. We decided to remove them as
"Dev Server" settings are obviously dev server settings, no need to
differentiate as separate tabs.
| Before | After |
|--------|--------|
| <img width="1024" height="1006" alt="CleanShot 2025-11-02 at 12 59
21@2x"
src="https://github.com/user-attachments/assets/0a8b0c2f-3f0a-487d-9344-b33b5ee016f5"
/> | <img width="1024" height="1006" alt="CleanShot 2025-11-02 at 12 59
07@2x"
src="https://github.com/user-attachments/assets/ddd3b029-8957-4129-aaf2-7b1a57a52e00"
/> |
