Resolve "Jobs page scrollbar and centering"

What does this MR do?

Fixes:

• Make scrollbar 7px wide
• Center scrollbar on arrows
• Titlebar should stretch

Screenshots (if relevant)

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 #33202 (closed)