Improve support for "receive from scratch" workflow, esp. for mobile

also try harder to make certain aspects easier to enable/disable via handler,
e.g. whether cases should be allowed as quantity input, or expired credits
should be a thing etc.

tailbone/views/purchases/core.py

@@ -160,16 +160,23 @@ class PurchaseView(MasterView):
                                            default_active=True, default_verb='contains')
         g.sorters['buyer'] = g.make_sorter(model.Person.display_name)
 
-        g.filters['date_ordered'].label = "Ordered"
+        # date_ordered
         g.filters['date_ordered'].default_active = True
         g.filters['date_ordered'].default_verb = 'equal'
-
+        g.set_label('date_ordered', "Ordered")
         g.set_sort_defaults('date_ordered', 'desc')
 
-        g.set_enum('status', self.enum.PURCHASE_STATUS)
-
-        g.set_label('date_ordered', "Ordered")
+        # date_received
+        g.filters['date_received'].default_active = True
+        g.filters['date_received'].default_verb = 'equal'
         g.set_label('date_received', "Received")
+
+        # status
+        g.set_enum('status', self.enum.PURCHASE_STATUS)
+        g.filters['status'].default_active = True
+        g.filters['status'].verbs = ['equal', 'not_equal', 'is_any']
+        g.filters['status'].default_verb = 'is_any'
+
         g.set_label('invoice_number', "Invoice No.")
 
     def configure_form(self, f):