That moment you sort your backpack with the automatic option:

Organizing your backpack the way you want can take quite a while as you need to drag items to the arrows to switch pages.

My suggestion in making the backpack a little bit better is:
"Add switching between pages with the Left and Right arrow keys."
"Add jumping to the first page with Down arrow and last page with Up arrow key"

This will speed up the process of organizing your backpack.
It's also a nice option for casually browsing your backpack.