Style the Moderation state control at the layout editing page

Thank abu-zakham for reporting and patching!

Not very sure

Better to have a library named moderation-control-layout-builder for example. And only load when we have both varbase_workflow + varbase_layout_builder

If we do have more custom variables we may run into a more complicated update process for old custom themes.
easier way to extend library ( or add a widget component in the components folder for the moderation-control-layout-builder library )
We may use a ready class by bootstrap 4 in the twig template file. to follow the custom style for that ready class by bootstrap 4 )

I agree.
One of the most performance taxing issues (according to Google Lighthouse) is Unused CSS and JS in pages.

https://web.dev/unused-css-rules/

So if we can limit the CSS to be loaded only when needed, would be much better.

A follow up issue #3170292: Fix the Moderation state control box with a better default style and fix a missing .css in the vartheme_bs4/moderation-state library