Keyboard navigation

[Jexordexan]

We should implement an intuitive keyboard control for the sorting.

The first list item should be the only focusable element.
By pressing up, down, left, right, you control the current selection.
By pressing enter or space you "grab" the current item.
By pressing up, down, left, right, you "move" the item.
By pressing enter you "drop" the item, or esc to cancel.
By pressing tab you exit the container.

https://medium.com/salesforce-ux/4-major-patterns-for-accessible-drag-and-drop-1d43f64ebf09