FIX: Keyboard navigation fixes in setup wizard (PR #9413)

  • Delete a positive tabindex from a reused component
  • Copy :hover styles to :focus
  • Replace an ‘outline: 0’ rule with a TODO for a custom :focus style

Discovered while fixing the no-positive-tabindex lint. Needed to test wizard w/ keyboard to reach the tabindex deletion, and encountered these other blockers.

GitHub

Fixed merge conflicts due to double quotes