Luckily for us real PC RPG gamers, there are a few great mods who address these issues.
Look on http://witchernexus.com/downloads/categories.php

In the user interface mods, there's a mod for better hud icons and another for better inventory. It adds a new category for misc (junk) items, ability to sort by name or cost/weight and so on. Also nice changes to alchemy so the game won't waste your quest items on your next potion.

This is how the game should have shipped imho. So I'm very glad that guy made this awesome mod.

Enjoy.