* Shift item order when selling instead of using last item to fill the slot
Player has items i1, i2, i3, picked up in that order.
Previous Behavior:
1. Sell window at vendor shows i1, i2, i3.
2. Player sells i1
3. i3 is last in list and replaces i1
4. Sell window now shows i3, i2.
New Behavior:
1. Sell window at vendor shows i1, i2, i3.
2. Player sells i1
3. i2/i3 are shifted in index position down to fill the gap left by previous index.
4. Sell window now shows i2, i3.
* Remove whitespace
chasedjones88