No, it hasn't. The only way is keeping loot in a separated backpack and dragging that specific backpack into the stash.
Thats how I do after a hunt... This way I dont have to "Right click" + "Stow all items of this type" 50x
I just drag the loot bp into the stash (some people don't know that you can drag a container into the stash and it will stow every item inside.
This way, the items you have that are outside that backpack are safe...