[hellopablo]

Summary

• Replace the jQuery UI sortable used by .js-admin-sortable with a pointer-event drag, so a table row never leaves its table.
• The dragged row stays a solid copy under the same parent as the table, which keeps styles that are scoped to that table. A dashed slot marks where it will land, and dropping still writes .js-admin-sortable__order.
• Select2 choice lists are unchanged and still use jQuery UI.

Test plan

• Hard-refresh an admin page that uses a sortable table, then drag a row by its handle.
• Confirm the copy stays styled, text is not selected while dragging, and the dashed slot stays in the table.
• Drop the row and confirm the order inputs are rewritten to the new indexes.
• Add and remove a dynamic-table row and confirm sorting still works on the new row.
• Confirm a select2 choice list can still be reordered.