Priorities/areas are currently draggable. But what if it was hierarchical?
Draggable Views should support Entity Reference Hierarchy.
Which version of Entity Reference Hierarchy should I use?
3.x is old but supported. 5.x uses next gen database featured, but has few users.
Could just use a taxonomy instead.
Entity Hierarchy issues
Add a tree editor for the whole hierarchy
Implement Page with Draggable Hierarchy Tree
Review this one.
Draggable Views issues
Is this for upward or downward references?
Create reference field for parent.
Core issues
Provide an entity hierarchy API
I was able to create a hierarchical draggable view. It doesn't use Entity Hierarchy.
Can I use the parent relationship outside of this view?
Can I display the hierarchy without Draggable Views?
