getting out of loot window

I am left-handed and therefore play using the arrow keys. Being able to remap all keybinds is essential for me in a game. I have the problem that when I loot containers/players, I can't close this window again with the key for the inventory. Since you can't remap Esc and it's too far away, I currently have to open the map twice to get out of the window. This is quite frustrating and cumbersome. Please change this.