Fixes for the comments in the map CSS
Fixes for the comments in the map CSS

Based on a range of comments made in the
associated pull request:
- https://github.com/alphagov/notifications-admin/pull/3996/files/7c2f4adfd5433a171654af62ed279d11a62503dc#r701234728
- https://github.com/alphagov/notifications-admin/pull/3996/files/7c2f4adfd5433a171654af62ed279d11a62503dc#r701235330
- https://github.com/alphagov/notifications-admin/pull/3996/files/7c2f4adfd5433a171654af62ed279d11a62503dc#r701235586
- https://github.com/alphagov/notifications-admin/pull/3996/files/7c2f4adfd5433a171654af62ed279d11a62503dc#r701242035
- https://github.com/alphagov/notifications-admin/pull/3996/files/7c2f4adfd5433a171654af62ed279d11a62503dc#r701241659

Co-authored-by: Ben Thorner <90b91a8305da3dfd8069e2ed1b938f1452d09955@users.noreply.github.com>

alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin