Ideally, we'd also have a way to swap the position of boxes without manually moving all their contents over.
For pc jumping you can use PixelExtras sidemods then /pc <box> command
For a command for swapping box position, a plugin was created called "FlashPlus" (mine) which allow you to do /swapbox <box1> <box2>
Hope it will help you alls !
What if we could hold the shift key to make the arrows move forward/backward 5 boxes at a time?