Reordering descriptors in descriptor list
When editing a descriptor list the user must be have the possibility to reorder descriptors.
Add a "Reorder descriptors" action button to the edit page that:
- Displays a list of only descriptor titles as
<ListItemwith "reorder" material-icon
- Allows user to begin reorder operation by dragging the reorder icon up-down
- Has "Save order" and "Cancel" buttons
