Allow overriding module CSS without overriding their toolbar styles

The Needs Review Queue Bot → tested this issue. It either no longer applies to Drupal core, or fails the Drupal core commit checks. Therefore, this issue status is now "Needs work".

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Getting error while applied patch #30, creating MR.

Pipeline issue need to fix so moving NW.

@djsagar Didn't notice that you are working on it.