Data Type UX - dialog enhancements: Add and Reorder

Background

Persona: Business analyst or Rules practitioner

Use Cases:
As a user I want to:

• Add fields first to last, not last to first, in an ordered list to support the "reading" order of the fields so that I can simplify my workflow.
• Reorder the list of Custom data types so that I can arrange data types in a logical order.
• Add list items in such a way that added Fields will be presented at the bottom of a structured list by default.

Functional considerations/ pre conditions:

• Fields will be presented at the bottom of a structured list by default.
• Design needs to be consistent with Stunner and PF components, such as: https://www.patternfly.org/pattern-library/widgets/#treegrid-table
• Drag-n-drop be evaluated with regard to accessibility.

Verification conditions:

• Scrum team and PO review.