Move settings into theme section within the libraries.yml

I've moved the settings into theme section within the libraries.yml file successfully. Kindly review the patch file .

Thanks for taking a swing at this. This patch misses `dist/css/global/settings/space.css`.

@pixelwhip `dist/css/global/settings/space.css` is already present inside base section in patch .

I've created a MR based on the comments listed above, please review.

This has been merged in and will be included in the next release.