Fix comparison MR vs PR
Description
Fixes some comparisons for: MRs vs PRs.
Also:
- Add date
- PDF set to null until we create it
- Remove unneeded nav file
Closes https://gitlab.com/gitlab-com/www-gitlab-com/issues/1384
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes some comparisons for: MRs vs PRs.
Also:
Closes https://gitlab.com/gitlab-com/www-gitlab-com/issues/1384