Further fixes of how passthrough items are handled

* When evaluating a plan, only give the pass-through treatment to
  items if the step they're part of was actually executed
* When marking a step "complete", ignore passthrough items

src/client/models/crafting/crafting_step.coffee

@@ -31,6 +31,7 @@ module.exports = class CraftingStep
 
     completeInto: (targetInventory)->
         for stack in @_recipe.output
+            continue if @_recipe.isPassThroughFor stack.itemSlug
             quantity = @_recipe.getQuantityProduced stack.itemSlug
             targetInventory.add stack.itemSlug, quantity * @_multiplier