[WIP] feature/refactoring preview

refactoring of the preview component and changes of the interface of the preview component to make it reusable for contacts and more

__Tasks:__

- [ ] adjust/refactor preview component
- [ ] adjust components which use preview
- [ ] move preview component to admin
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none