Checkout: update editor checkout style

[eoigal]

Fixes #93898

Removes empty space above Checkout title in editor checkout modal.

Before

After

Demo (comparing positioning in modal vs regular checkout)

Screen.Recording.2024-09-03.at.10.43.31.mov

Proposed Changes

• Updates styles to use a different margin-top when viewing checkout in editor checkout modal

Why are these changes being made?

• Logical flows

Testing Instructions

• Open a post on a simple test site
• Go to Jetpack SEO upgrade
• It should open the editor checkout modal
• Confirm it looks ok

Pre-merge Checklist

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

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-118127

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-118127&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-118127&env=a8c-for-agencies

[matticbot]

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

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

• notifications
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/editor-checkout-style on your sandbox.

[matticbot]

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

Sections (~33 bytes added 📈 [gzipped])

name      parsed_size           gzip_size
checkout       +163 B  (+0.0%)      +33 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.

Async-loaded Components (~33 bytes added 📈 [gzipped])

name                                             parsed_size           gzip_size
async-load-calypso-my-sites-checkout-modal            +163 B  (+0.0%)      +33 B  (+0.0%)
async-load-calypso-blocks-editor-checkout-modal       +163 B  (+0.0%)      +33 B  (+0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

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.

[sirbrillig]

No objections here.

[DustyReagan]

Tested and looks good!