Added the ability to shift-click on queue reagent items to replace their quantity in the shopping list instead of adding.

Added the ability to shift-click on queue reagent items to replace their quantity in the shopping list instead of adding.
Added a "restore defaults" item to the filter drop down.
Added the ability to shift-click on an item name (not icon) in the skill list to link the recipe instead of the item.
Caused the shopping list to update when acquiring items.