DIFM: Summary page updates

[m1r0]

Resolves #102001

Proposed Changes

This PR makes a few small style changes on the DIFM summary page. It closely followed the proposed design.

• "Total" -> "Subtotal".
• Align the Subtotal to the top.
• Update the spacings.
• Remove the asterisks and the associated text.
• Change the position of the money-back guarantee paragraph.
• Increase the width of the checkout button.
• Increase the subtotal price font size on mobile.
• Fix the borders.

Desktop:

Mobile:

Why are these changes being made?

• This is part of Revamp: DIFM onboarding flow #100580

Testing Instructions

• Go to /setup/site-setup/difmStartingPoint?siteSlug=[yoursiteslug] and follow the flow until you get to the Summary screen.
• Compare it with the requirements from the related task.

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 UI changes, have we tested the change in various languages (for example, ES, PT, FR, or DE)? The length of text and words vary significantly between languages.
• 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-143683

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-143683&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-143683&env=a8c-for-agencies

[matticbot]

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

Async-loaded Components (~25 bytes removed 📉 [gzipped])

name                                 parsed_size           gzip_size
async-load-signup-steps-page-picker        +16 B  (+0.0%)      -25 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.

[matticbot]

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

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

• help-center
• notifications

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/difm-summary-page on your sandbox.

[m1r0]

@fditrapani, here's another one. 🙂

Btw, I'm not sure if a review is needed from your side. Let me know if you prefer to skip that for the smaller/straight-forward changes.

[m1r0]

@fditrapani, you mentioned that the blue color needs an update. Can you tell me which is the correct color to use, or send me the Figma? 🙏