Better scale management for order creation

+ Extends labels formatting of scale.

kfet/views.py

@@ -1910,9 +1910,12 @@ def order_create(request, pk):
     else:
         formset = cls_formset(initial=initial)
 
+    scale.label_fmt = "S-{rev_i}"
+
     return render(request, 'kfet/order_create.html', {
         'supplier': supplier,
         'formset': formset,
+        'scale': scale,
     })