You have auto arrange, makes things tidy but causes game stutter. So I know I have it off in PvP.

But, then everything is a mess, and I’m not so anal that I keep my inventory sorted all the time.

What about a one click ‘sort’ button. It auto arranges all your items once.

So, it acts like auto arrange, but it's not doing it all the time. It dose it once when you click it… Insted of every time there is an inventory call, like picking up items or using potions.

Function is already there, just one more button /Icon, maybe even have the ‘Auto arrange’ text clickable and it does the one off sort?