UI update to support prototype and configuration classes

- Optional attributes
- Maybe add tooltips to all fields / fields set to provide information what each attribute does

Start by locating the UI entry point for prototype and configuration classes, then inspect how their attributes are rendered. Determine how optional attributes should appear and where field descriptions can be exposed as tooltips. Done means both class types support optional fields and users can discover what each attribute does.

Written by the indexing model from the issue text.