Remove close button from banner and move to a page action

[nwmac]

Summary

Fixes #13251

Occurred changes and/or fixed issues

This PR modifies the UI slightly to avoid the issue with keyboard navigation on the banner close icon.

The banner can now be shown/hidden by the page action menu - this feels like a better fit.

PR adds an e2e test to cover the change.

Restore hidden cards now only restores the what's new and login preference banner visibility.

Screenshot/Video

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

[rak-phillip]

LGTM - functions well, and I only have a few optional comments to consider.