yeah i think this was @kaen01 's not sure if he went and make a new oneThere was a bank and bag sorter (not across accounts). The creator removed it, as is there right. can go in and search inv, grab items and drop in inv/bank to stack. using the same search function, no real reason to sort, since you can arrange by various stats, name, value, location.
Make a hotkey, /autobank
Shift click a stack, press the hotkey, shift click the next, etc
just keep slamming that hotkey while shift-clicking stacks. Will take like 20-30 seconds.