The rework for said "Sort" button should be that instead of splitting supplies and other items by 1000, therefore taking up even more space, to take less space, they get put in a "superstack".
EG; When you take a stack that hasn't been filled and put a full stack, going over the 1k limit, ensuring the stacks take up less clutter. (Another way to explain is to take 1000 supplies and add them to an unfinished supply of 500 supplies, making the stack 1500 instead of 1000, then 500, while also saving space.)
Another thing the "Sort" rework can do is put the Supplies, Fuel, Crew, Marines, etc (anything not a weapon/LPC) at the top, instead of the bottom.