1.7.10 NEI had the following:

Open any inventory. Hover an item stack and shift-rmb. Every but one item of that stack will be transferred to the inventory, or from the inventory to yours.

This binding was very useful, as you could preserve spaces in your inventories. Now that we have quarks quicksort it would be even more useful. As Inventory-Tweaks yet reissues alot of NEI's bindings, I humbly ask for this addition.