Only scroll to bottom if it hasn't beed scrolled yet

What does this MR do?

Stops autoscroll once user has scrolled once. Issue description said "Always scroll to the bottom" We forgot that if the user scrolls up in the meanwhile it can be a little annoying.

Does this MR meet the acceptance criteria?

• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #33210 (closed)