Possibility to update existing order with new products in batch

In order to speed up the process we suggest Batch update - meaning we should be able to search for an item and then enter the quantity to add to the order then search for the next item and add the quantity and then the next and the next when all done adding items and quantities to the order then we click on the ok button and it all gets updated at once.

This will greatly improve and speed up the functionality of adding items to a customer's order