styling fixes and fix for supplier deleted products...

app/models/list.rb

@@ -264,7 +264,7 @@ class List
       order_total = 0.0
       for product_order in order.product_orders
         order_total += (product_order.amount * product_order.price).round(2)
-        ho[:products] << {name: product_order.product.name, id: product_order.product_id, number: product_order.amount, price: product_order.price}
+        ho[:products] << {name: product_order.product_name, id: product_order.product_id, number: product_order.amount, price: product_order.price}
       end
       ho[:total_amount] = order_total.round(2)
       ho[:state] = order.state

app/models/product_order.rb

@@ -10,4 +10,9 @@ class ProductOrder
   view :by_product_id, key: :product_id
   view :by_order_id, key: :order_id
 
+  # Getter for product name. If a supplier deletes a product, that has product_orders, the product
+  # will become nil. This method should handle this case.
+  def product_name
+    product.try(:name) || '[deleted]'
+  end
 end