Fix email upsell page styles in site context

[Imran92]

Related to #97961
and #97962

Proposed Changes

• Fix the contents getting too wide in site-context
• Fix the revamp classes not getting assigned in site-context
• FIx the back button being visible
• Fix context menu not appearing in site-context on Email inbox list

Why are these changes being made?

• Domain management revamp - site context

Testing Instructions

• Enable the feature flag by window.sessionStorage.setItem('flags', 'calypso/all-domain-management')
• Purchase a blog domain and attach a site with it. Don't purchase any mailbox and don't any email forward either
• Now go to calypso.localhost:3000/sites and open this site in flyout
• Scroll to bottom and click on the row to open the domain in site context
• Ensure that the site overview page looks the same as when it's not in site-context
• Now switch to the Emails tab and make sure everything looks the same as in domain-context
• Make sure no design in breaking in domain-context
• Now purchase one or more professional emails for this domain or another domain
• Open that domain in site context and switch to the Emails tab
• Make sure the emails list look and work the same as domain-context email list page

Screen.Recording.2025-01-09.at.8.38.48.PM.mov

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-129483

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-129483&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-129483&env=a8c-for-agencies

[matticbot]

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

Sections (~123 bytes added 📈 [gzipped])

name                        parsed_size           gzip_size
hosting                          +235 B  (+0.0%)      +85 B  (+0.0%)
domains                          +214 B  (+0.0%)      +74 B  (+0.0%)
site-overview                    +124 B  (+0.0%)      +54 B  (+0.0%)
email                             +98 B  (+0.0%)      +28 B  (+0.0%)
staging-site                      +17 B  (+0.0%)      +13 B  (+0.0%)
sites-dashboard                   +17 B  (+0.0%)      +13 B  (+0.0%)
site-tools                        +17 B  (+0.0%)      +13 B  (+0.0%)
site-settings                     +17 B  (+0.0%)      +13 B  (+0.0%)
site-performance                  +17 B  (+0.0%)      +13 B  (+0.0%)
site-monitoring                   +17 B  (+0.0%)      +13 B  (+0.0%)
site-marketing                    +17 B  (+0.0%)      +13 B  (+0.0%)
site-logs                         +17 B  (+0.0%)      +13 B  (+0.0%)
hosting-features                  +17 B  (+0.0%)      +13 B  (+0.0%)
github-deployments                +17 B  (+0.0%)      +13 B  (+0.0%)
a8c-for-agencies-sites            +17 B  (+0.0%)       +9 B  (+0.0%)
a8c-for-agencies-referrals        +17 B  (+0.0%)       +8 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

• notifications
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug fix/email-upsell-site-context on your sandbox.

[bogiii]

Tested and everything works as described. 👍