Warning when missing code list for radiobuttons/radioknapp or checkboxes/avkrysningsboks

### Description

In Altinn Studio there is a preview of the form as you define it. When you drag a radiobutton onto a page you get a warning box because you are missing a data binding. But after you have added the data binding, the component **disappears** in the preview. This happens when it is still missing an option list. There is no warning/error box in the preview to indicate what the reason is for the sudden disappearance of the component. It would be a good thing to have.

### Additional Information

[Relevant slack thread](https://altinn.slack.com/archives/C02EJ9HKQA3/p1728900018250319).

Reproduce the preview behavior by adding a radiobutton or checkbox with a data binding but no option list. Trace the preview handling for these components; done means the component remains represented with a warning or error explaining that its option list is missing.

Written by the indexing model from the issue text.