Here's a couple mods I just did today.
The Container one's nothing new, but I did do it myself. Just adds the Primary and Secondary Melee to the top of the window.
The Hotbox is new though. Pretty much just 'squashed' it, while adding the INV Slot 1 and 8 to the end there.
I also added the Minimize button and changed the Spell Icon background. Modifying that added a nice effect I like, and kept. Added a bit of 'pizaas' to the box, I think.
Both mods are downloadable from my site.
Cheers!