Ability to have the Labels field  supported on Proforma

The KBLinking ProForma fields to Jira fields mention that

Note that while this method should work in most cases, it will not work for the following field types:

• Attachment
• Custom cascading choice lists (single or multiple)
• Custom next-gen people fields
• Due date (Server and Data Center)
• Labels 
• **Field created by other apps (ProForma does not currently integrate with DEISER ProFields. Integration with Insight fields is in development.)

Note that we are working to improve how ProForma recognizes available fields and to make it possible to link to all field types.