Nav redesign - update github deployments header style

[eoigal]

Fixes https://github.com/Automattic/dotcom-forge/issues/7188

Proposed Changes

• Updates header-cake component to support using alternative icon (i.e. chevron-left)
• Updates github deployment preview pane header to reflect design changes

Before

After

Not sure about

• The back icon size is 18px - will need to amend the HeaderCakeBack component to support alternative sizes.
• The back link onClick event just redirects to /sites - I don't appear to have access to the closeSitePreviewPane function which I think would be cleaner here.

Testing Instructions

• Go to Github deployments preview pane for a test site and confirm styles are 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-108301

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-108301&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-108301&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

• odyssey-stats
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/github-deployments-header on your sandbox.

[matticbot]

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

Sections (~147 bytes added 📈 [gzipped])

name                             parsed_size           gzip_size
github-deployments                     +64 B  (+0.0%)      +27 B  (+0.0%)
videopress-flow                        +18 B  (+0.0%)       +8 B  (+0.0%)
update-design-flow                     +18 B  (+0.0%)       +8 B  (+0.0%)
themes                                 +18 B  (+0.0%)       +7 B  (+0.0%)
theme                                  +18 B  (+0.0%)       +5 B  (+0.0%)
site-purchases                         +18 B  (+0.0%)       +7 B  (+0.0%)
settings                               +18 B  (+0.0%)       +6 B  (+0.0%)
sensei-flow                            +18 B  (+0.0%)       +8 B  (+0.0%)
security                               +18 B  (+0.0%)      +10 B  (+0.0%)
purchases                              +18 B  (+0.0%)       +7 B  (+0.0%)
podcasts-flow                          +18 B  (+0.0%)       +8 B  (+0.0%)
plugins                                +18 B  (+0.0%)       +7 B  (+0.0%)
people                                 +18 B  (+0.0%)       +6 B  (+0.0%)
migrate                                +18 B  (+0.0%)       +7 B  (+0.0%)
media                                  +18 B  (+0.0%)      +11 B  (+0.0%)
link-in-bio-tld-flow                   +18 B  (+0.0%)       +8 B  (+0.0%)
jetpack-cloud-plugin-management        +18 B  (+0.0%)       +7 B  (+0.0%)
import-hosted-site-flow                +18 B  (+0.0%)       +7 B  (+0.0%)
import-flow                            +18 B  (+0.0%)       +7 B  (+0.0%)
hosting                                +18 B  (+0.0%)       +7 B  (+0.0%)
help                                   +18 B  (+0.0%)       +6 B  (+0.0%)
google-my-business                     +18 B  (+0.0%)       +8 B  (+0.0%)
email                                  +18 B  (+0.0%)       +5 B  (+0.0%)
domains                                +18 B  (+0.0%)       +8 B  (+0.0%)
devdocs                                +18 B  (+0.0%)      +11 B  (+0.0%)
copy-site-flow                         +18 B  (+0.0%)       +8 B  (+0.0%)
concierge                              +18 B  (+0.0%)       +9 B  (+0.0%)
comments                               +18 B  (+0.0%)       +6 B  (+0.0%)
account-close                          +18 B  (+0.0%)       +7 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 (~57 bytes added 📈 [gzipped])

name                                               parsed_size           gzip_size
async-load-store-app-store-stats-listview                +18 B  (+0.0%)       +9 B  (+0.0%)
async-load-signup-steps-domains                          +18 B  (+0.0%)       +8 B  (+0.0%)
async-load-calypso-reader-tag-stream-main                +18 B  (+0.1%)       +5 B  (+0.1%)
async-load-calypso-reader-site-stream                    +18 B  (+0.1%)       +9 B  (+0.1%)
async-load-calypso-reader-search-stream                  +18 B  (+0.0%)       +8 B  (+0.0%)
async-load-calypso-reader-feed-stream                    +18 B  (+0.1%)       +9 B  (+0.1%)
async-load-calypso-post-editor-media-modal               +18 B  (+0.0%)      +11 B  (+0.0%)
async-load-calypso-post-editor-editor-media-modal        +18 B  (+0.0%)      +11 B  (+0.0%)
async-load-calypso-my-sites-stats-comment-follows        +18 B  (+0.1%)       +7 B  (+0.1%)

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.

[arthur791004]

Is it possible to make the icon smaller and closer to the "Back" text?

Design	Current

[eoigal]

The simplest way I found here is to set the width in css with !important.

[mmtr]

Works as advertised.

I noted though that there are a few things that could be changed, but I don't know where the Figma with the design specification is located to confirm whether it was requested this way or not. It can be polished if needed in a follow-up, but wanted to mention it just in case (cc @lucasmendes-design).

Back button not aligned with card title

Chevron not centered

There is a separation line that does not appear in the design shared here

[taipeicoder]

LGTM 👍