Untangling: apply new design to Settings -> Administration -> Transfer site

[fushar]

Fixes https://github.com/Automattic/dotcom-forge/issues/9860

Proposed Changes

This PR applies the new global view design to Settings -> Administration -> Transfer site flow.

Why are these changes being made?

pbxlJb-6ye-p2

Testing Instructions

1. Open /sites.
2. Click a site.
3. Go to Settings -> Administration.
4. Click the Transfer site button.
5. Verify you see this:

6. Enter another username of yours and click Continue. Verify you see:

7. Tick all toggles and click Start transfer. Verify you see:

8. Check your email with the subject Confirmation needed to finish blog transfer. Click the button:

9. You will get redirected to https://wordpress.com/settings/start-site-transfer/:slug?site-transfer-confirm=code.
10. Manually change the URL to https://<calypso-live-url>/sites/settings/administration/:slug/transfer-site?site-transfer-confirm=code. Verify you see:

11. Go to the recipient's email. Accept the transfer. Verify that the is transferred successfully.
12. REGRESSION: Transfer another site via /settings/general/:slug; verify the flow can still be completed.

Pre-merge Checklist

• [x] Has the general commit checklist been followed? (PCYsg-hS-p2)
• [x] Have you written new tests for your changes?
• [x] Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• [x] Have you checked for TypeScript, React or other console errors?
• [x] Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• [x] Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• [x] For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions[bot]]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-125054

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-125054&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-125054&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~36 bytes added 📈 [gzipped])

``` name parsed_size gzip_size settings -150 B (-0.0%) +28 B (+0.0%) site-settings +48 B (+0.0%) +47 B (+0.0%) ``` Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

**Parsed Size:** Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory. **Gzip Size:** Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• blaze-dashboard
• command-palette-wp-admin
• help-center
• notifications
• odyssey-stats
• whats-new
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug untangling/transfer-site on your sandbox.

[a8ci18n]

This Pull Request is now available for translation here: https://translate.wordpress.com/deliverables/17009403

Some locales (Hebrew, Japanese) have been temporarily machine-translated due to translator availability. All other translations are usually ready within a few days. Untranslated and machine-translated strings will be sent for translation next Monday and are expected to be completed by the following Friday.

Thank you @fushar for including a screenshot in the description! This is really helpful for our translators.