[Enhancement] Use new theme in surface components

[RasmusKjeldgaard]

• I have written a good issue

Describe the enhancement

The new theme should be implemented in components that act as surfaces for other components. A surface is an element that does not inherit the existing theme variables from its parent, but instead imports and sets its own theme variables, for itself and all children. In other words, it establishes a new theme context.

• Page
• Card
• List
• Sidebar (extensions)
• Modal

Describe the solution you'd like

Have you considered any alternatives?

Are there any additional context?

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Checklist:

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Refinement

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