BUG: Style Manager Fails to Interpret Descendant Selectors Correctly

GrapesJS version

• I confirm to use the latest version of GrapesJS

What browser are you using?

Chrome Version 131.0.6778.205

Reproducible demo link

https://codesandbox.io/p/sandbox/naughty-microservice-5hp3h4

Describe the bug

How to reproduce the bug:

1. Add the dark-style class to the body:

   editor.getWrapper().addClass("dark-style");
   

2. Add a descendant selector rule:

   editor.CssComposer.addRules(".dark-style .test-block { margin-top: 50px; }");
   

What is the expected behavior: Interpret in style manager as margin-top: 50px;

What is the current behavior: Does not show up in style manager, but renders correctly in canvas

Html example:

<div id="gjs">
  <div class="test-block">Hello World!!!</div>
</div>

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct