Requests to create a new group at the end, in response to a drag-n-drop in the last empty space. Specifies a tile to transfer to the new group from the old group.
Group removals (in response to drag-n-drop or explicit tile removal (in case group turns empty))
Group transfers (tiles moving to other groups, in response to actions like drag-n-drop).
Moved tiles (in response to actions like drag-n-drop or direction change).
x and y may be -1 to indicate last position
(when a shifting/bounds limit occurs).
Bulk change in a live tiles layout.