Move bookmark hanger arrow now that reload is on about pages

[jkup]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Fix #4923

Auditors @bsclifton @darkdh

Test Plan:

Make sure the new bookmark UI's arrow on the top lines up with the star in all situations.

[darkdh]

looks good to me

[bsclifton]

👍