You can already do it! Awesome!
I voted yes, but my vote should only count if it works like you mark the stack and then click a "merge to inventory" button. Not moving all of the stuff, then I would really be in deep shit.
One problem with such a button is that I'm using boxes for the new stuff since my storage is full... With all the shit they added it would be nice to get another 250 available storage points in the storage.
Im not sure about this... since if it were implemented then pvp would become utterly useless as you cant loot stuff in storage . What I do to drag quickly is I move the storage much closer to the inventory window and do like ppl have said merge all stacks so dragging time is reduced..I think its fine just the way it is and its always been like that as far as I know.
Mark