Gk browser drag reorder array

Possible to drag array items to reorder. Animated.

Requires change in bindings

https://app.asana.com/0/15028213105325/13316669162245
If this matches the semantics of the `move()` method in core, then Gustafs text is actually correct. You don't want to specify the move with the final position, as that is likely to be influenced be the move itself (if you move the object from a position above the target position, it will be affected by the fact that the object will be removed above it). Since it is adjust differently based on which positions you move from/to the final position is not really usable as a stable input.