Help Center: Improve clear chat button styling

[renancarvalho]

Related to https://github.com/Automattic/dotcom-forge/issues/9755 Fixes https://github.com/Automattic/dotcom-forge/issues/9755

Proposed Changes

• Improve Help Center clear chat styling.

Why are these changes being made?

• It does not look nice

Testing Instructions

• Use live link and add this flag ?flags=help-center-experience
• Start a chat with Wapuu
• Click on the ellipsis on the header ( ... )
• Compare the clear chat styling from live link and prod.
• Should look like

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[bot]]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-b33114bdb033fdda27a738e8146a5e615dd15e99

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-b33114bdb033fdda27a738e8146a5e615dd15e99&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-b33114bdb033fdda27a738e8146a5e615dd15e99&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 (~318 bytes removed 📉 [gzipped])

``` name parsed_size gzip_size async-load-automattic-help-center -1376 B (-0.2%) -318 B (-0.2%) ``` 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.