Login and Registration: Fix spacing in admin email confirmation buttons

[sanketio]

Fixes a spacing issue in the administration email verification screen.

The .admin-email__actions div selector was too broad and provided no wrapping behaviour for the action buttons. On locales with longer button text (e.g. fr_FR), the "Update" and "The email is correct" buttons lost proper spacing.

Additionally, two CSS rules — .login .admin-email-confirm-form .submit and .admin-email__later — were targeting class names that no longer exist in the HTML markup and have been removed.

Changes:

• Replace .admin-email__actions div { padding-top } with targeted .admin-email__actions-primary rule using display: flex, flex-wrap: wrap, and gap: 0.5em so buttons wrap gracefully on any locale.
• Add .admin-email__actions-secondary rule with a reduced padding-top for the "Remind me later" link row.
• Remove orphaned margin-left/margin-right from .login .admin-email__actions .button-primary — spacing is now handled by flex gap on the container.
• Remove dead .login .admin-email-confirm-form .submit and .admin-email__later rules.

Trac ticket: https://core.trac.wordpress.org/ticket/64774

Use of AI Tools

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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Props sanketparmar, mukesh27, valentingrenier.

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[github-actions]

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[valentin-grenier]

How to test locally

1. Launch a local WordPress instance on your machine
2. Go to /wp-admin/options.php page
3. Search for admin_email_lifespan (CTRL/cmd + f)
4. Replace the timestamp with a future one — you can easily generate a timestamp here
5. Open a terminal with WP-CLI support
6. Run those two commands: wp transient delete --all and wp cache flush
7. Log out and wait for the timestamp to become expired
8. Log in again — you should be able to reach the admin email confirmation page
9. Check for the patch

[mukeshpanchal27]

It was added in https://core.trac.wordpress.org/changeset/45757 but admin-email-confirm-form form didn't use the submit class since it was implemented

[sanketio]

So should I keep it, or is it fine to remove it?