Resolve "regression in commit title bar"

What does this MR do?

fixes title bar of commit title bar to be consistent with other views

reorders the copy to clipboard button correctly from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8020

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

consistency with other object views title bars

correct order of copy clipboard button after content

Screenshots (if relevant)

old:

new:

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • 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 #27013 (closed)