Long time no see..
I have a question related to this.. Could you not give items an Icon/sprite status so that no mater where it is moved on the screen it is 'grabable'?
It seems that otherwise you have strict rules set about where things are in each layout. (by layout I mean character backpack and dungeon view)
Though, you have things in alcoves and can pick them up.. they are not really on the floor. You hav buttons which can be activated but not taken.. however still are manipulated.
It just might be interesting. annother thing that could be cool and related to this is to make a moving object.. something that floats about the dungeon. you can do this with object teleporters in DM.. however to make it a floating object.. this way you could have something like a Fairy flying about, and catch it.
just an idea