Allow hiding asset layout fields without deleting data, and sync make and model as separate fields from CW RMM

The ConnectWise RMM integration currently populates a combined “Make & Model” field. It would be helpful to split this into two separate fields, Make and Model, for cleaner organization and reporting. During that transition, there should be an option to hide the existing combined field while temporarily retaining its data, making it easy to compare and identify which assets aren’t being populated through CW RMM. This would require support for hiding asset layout fields without data loss, along with the ability for the CW RMM integration to sync make and model to individual fields.