I've seen custom UI pieces that show all your bagged items in just 1 window. Would be a cheap work around, since emu currently doesn't support bigger bags.
I personally use
this mini map mod which has an extra tab with all the bags in rows with their contents. the link goes to the eq interface page where you can see and download it.
Danjal
"If I need you I'll give you a signal."
"What signal?"
"I'll imitate the scream of a terrified little girl"
— Jim Butcher