cycle between mixed state in checkbox

app/activities/PriceCheck.py

@@ -200,7 +200,7 @@ class PriceCheck(FocusWidget):
           'price': AutoCompleteFloatEdit(('bg', 'price')),
         }
         self.checkboxes = {
-          'organic': NoTabCheckBox(('bg', "Organic"), state='mixed'),
+          'organic': NoTabCheckBox(('bg', "Organic"), state='mixed', has_mixed=True),
         }
         self.text_fields = dict((
          (k, Text('')) for k in ('dbview', 'spread', 'rating', 'marker')

app/activities/RecipeEditor.py

@@ -444,7 +444,7 @@ class RecipeEditor(FocusWidget):
             ) for idx, ingredient in enumerate(recipe['ingredients'])
         ]
 
-        self.organic = NoTabCheckBox(('bg', "Organic"), state='mixed')
+        self.organic = NoTabCheckBox(('bg', "Organic"), state='mixed', has_mixed=True)
         self.instructions = Edit('', edit_text=recipe['instructions'] or u'', multiline=True, allow_tab=True)
         self.feeds = Decimal(recipe['feeds'])
         self.price = Text('')

app/activities/TransactionEditor.py

@@ -369,7 +369,7 @@ class TransactionEditor(FocusWidget):
             'price': AutoCompleteFloatEdit(('bg', 'price')),
         }
         self.checkboxes = {
-            'organic': NoTabCheckBox(('bg', "Organic"), state='mixed'),
+            'organic': NoTabCheckBox(('bg', "Organic"), state='mixed', has_mixed=True),
         }
         self.text_fields = {
             'dbview': Text(''),