Function arrayMove

external/.datatables.js:17148–17154

* Mutate an array, moving a set of elements into a new index position * * @param arr Array to modify * @param from Start move index * @param count Number of elements to move * @param to Index where the start element will move to

(arr, from, count, to)

	 * @param to Index where the start element will move to
	 */
	function arrayMove(arr, from, count, to) {
		var movers = arr.splice(from, count)
		// Add delete and start to the array, so we can use it for the `apply`
		movers.unshift(0) // splice delete param
		movers.unshift(to < from ? to : to - count + 1) // splice start param
		arr.splice.apply(arr, movers)
	}
	/**
	 * Run finishing activities after one or more columns have been reordered.
	 *