Movement Trays

It would be great to be able to implement movement trays for miniatures war games

So having a movement tray piece (eg a rectangle) which can have multiple pieces placed onto it and when the movement tray is moved, everything on top of it moves with it. I know I can select multiple objects at once but it’s not quite the same. Kind of like the stacks of cards but it ideally needs to maintain the layout of pieces placed on top of it.