Vitrum: fixes issues mentioned on issue 8500

[henriqueiamarino]

This PR fixes the issues mentioned in issue #8500 by @iamtakashi.

• Fixed the button padding and stroke sizes;
• Adjusted contentSize to 1050px;
• Remove unused patterns patterns/about.php, and patterns/hidden-404.php;
• On readme.txt and style.css: Change Tested up to: to 6.7 and Requires PHP: to 7.0;
• Reviewed the image credits, removing unnecessary links;
• Removed theme tags and added the mentioned one;
• Removed duplicated comment is duplicated in style.css;
• Removed several numeric font sizes in the theme, replacing them with preset type sizes;
• Changed the theme version to 1.4.0 in style.css.

[github-actions]

Preview changes

I've detected changes to the following themes in this PR: Vitrum.
You can preview these changes by following the links below:

• Preview changes for Vitrum

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Note

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[github-actions]

Theme-Check results

vitrum: No changes required ✅.

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[iamtakashi]

Thanks for the updates @henriqueiamarino! The changes all look great.

I only pushed a change that made the following templates patterns since they had some strings that needed to be localised. 404, archives, index, search, and single posts. I just resaved those templates with the CBT.

Merging.