Revert change to design. Go back to scrollable page

What does this MR do?

• Remove the contained scroll area.
• Add affix to the top control area.
• Remove all absolute positioned code related.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• 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 #34531 (closed)