Fixed failures in show-view of StockOrders. (#195)

app/views/orders/_articles.html.haml

@@ -4,6 +4,7 @@
     %th Gebinde
     %th Netto-/Bruttopreis
     %th Bestellte Einheiten
+    - unless order.stockit?
       %th Volle Gebinde
   - total_net, total_gross, counter = 0, 0, 0
   - order.articles_grouped_by_category.each do |category_name, order_articles|
@@ -21,6 +22,9 @@
         %td=h order_article.article.name
         %td= "#{unit_quantity} x #{order_article.article.unit}"
         %td= "#{number_to_currency(net_price)} / #{number_to_currency(gross_price)}"
+        - if order.stockit?
+          %td= units
+        - else
           %td= "#{order_article.quantity} + #{order_article.tolerance}" if unit_quantity > 1
           %td= units
 %p