458 UI feedback small fixes for site kit widgets

[vraja-pro]

Context

Summary

This PR can be summarized in the following changelog entry:

• Fixes copy and styling for the site kit widgets.

Relevant technical choices:

• I refactor the top 5 most popular render content to be in a separate component for readability.

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Set up an environment for site kit with the feature branch enabled.
• Check you have the site kit set up widget and click on the 3 vertical dots menu.
• Check there is space of 8px between the dots and the and the menu.
• Check the menu items font weight is normal ( not 500)
• Connect to site kit.
• Check you see the table content.
• Check you see the loading effect on the table.
• Check the x in the table is vertically aligned to the center of the row.
• Hover a grey score bullet on the last row and check the copy in the tooltip is as follow:

Content analysis hasn't started. Please open this page in your editor, enter a focus keyphrase and save.

• Create an error for the "Top 5 most popular content" widget, follow the steps here.
• Check the error width is limited to 672px of wider screens.

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes UI feedback (small fixes) for Site Kit widgets

[thijsoo]

CR + ACC 👍