Describe the bug

Some widgets throw when they receive an unexpected value, which causes the entire editor to error out.

To Reproduce

• Create a raw content file to edit in the CMS
• In the file frontmatter (or in the general file if it's a data file) include a property with a string value
• Configure the CMS to edit this property with a list widget
• Load the entry

Expected behavior

The CMS shouldn't crash.

Additional context

Related to #3509

This strategy should apply to both widget control components and preview components.