Merged Five 1.2 branch changeset 20253:

Send ContainerModifiedEvent when appropriate.

This requires Five 1.3+ >= r20254.

Some BBB has been kept until Zope 3.2 >= r40368 is stiched in.

BTreeFolder2.py

@@ -40,6 +40,7 @@
 from zope.event import notify
 from zope.app.container.contained import ObjectAddedEvent
 from zope.app.container.contained import ObjectRemovedEvent
+from zope.app.container.contained import notifyContainerModified
 from OFS.event import ObjectWillBeAddedEvent
 from OFS.event import ObjectWillBeRemovedEvent
 import OFS.subscribers
@@ -443,6 +444,7 @@ def _setObject(self, id, object, roles=None, user=None, set_owner=1,
 
         if not suppress_events:
             notify(ObjectAddedEvent(ob, self, id))
+            notifyContainerModified(self)
 
         OFS.subscribers.compatibilityCall('manage_afterAdd', ob, ob, self)
 
@@ -461,6 +463,7 @@ def _delObject(self, id, dp=1, suppress_events=False):
 
         if not suppress_events:
             notify(ObjectRemovedEvent(ob, self, id))
+            notifyContainerModified(self)
 
 
     # Aliases for mapping-like access.