Up until now, in the assistant 2, if you scrolled up either while a
message was being generated or after it's been generated, then submitted
a new message, you'd keep your scroll position. Now, with this PR, if
your scroll position is somewhere else that's not the bottom, as you
submit a new message, you'll be back at the bottom.
https://github.com/user-attachments/assets/8b111c10-27ff-4d7b-9b10-4c31093c6457
Release Notes:
- N/A
Co-authored-by: Agus Zubiaga <hi@aguz.me>