[Paginator] Fix for not applying custom classes

[Tyme-Bleyaert]

Pull Request

📖 Description

Fix for not applying custom classes.

🎫 Issues

#4205

✅ Checklist

General

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have added Unit Tests for my new component
• I have modified an existing component
• I have validated the Unit Tests for an existing component

[Tyme-Bleyaert]

TODO: write unit test to prevent this from happing in the future.

Gonna do that this evening, but just so i don't forget.

[vnbaaij]

@Tyme-Bleyaert in dev-v5 branch we already have tests in place that checks and test components on all the shared/standard parameters/properties like Id, Class, Style etc. Not really worthwhile to add them to v4 anymore, I think,