fix units_to_order display [ci skip]

app/views/orders/_edit_amount.html.haml

@@ -8,10 +8,10 @@
     %td.name{title: order_title.join("\n")}= order_article.article.name
     %td #{order_article.article.unit_quantity} × #{order_article.article.unit}
     %td #{order_article.quantity} + #{order_article.tolerance}
-    -#%td # TODO implements invoice screen
+    %td
       = order_article.units_to_order
       %i.package pkg
-    %td
+    -#%td # TODO implement invoice screen
       - unless order_article.units_billed.nil?
         = order_article.units_billed
         %i.package pkg