I want to force a grid item to always be in the last position even after moving items around.
I am thinking a good approach would be to
//get the total number of items
var totalItems = $('.grid-item').length;
//adjust the .last item to be the last item in the array ????
$('.last') grid order is totalItems + 1
//layout items again
$grid.packery('layout');
..and execute that after a change is made.
I have created a fiddle which is complete except for the magic to make the order update: https://jsfiddle.net/2buqd4nu/
I would be happy to accept any other approach that would achieve the same effect.