Preferences View - User types

We want to redesign the user type option:

<img width="1136" height="252" alt="Image" src="https://github.com/user-attachments/assets/236f8fdd-43de-4b3a-b8b5-5e3c9c5d9e3a" />

Previously, it was possible to select both user types, but that does not make sense. Because it was not working anyway (implemented consistently) we will make this selection a one-type user selection.