Merged r69910:69911 from 2.8 branch.

Help avoid acquisition disaster in Folder.manage_main (main.dtml).

lib/python/OFS/ObjectManager.py

@@ -168,6 +168,8 @@ class ObjectManager(
 
     isPrincipiaFolderish=1
 
+    has_order_support = 0 # See OrderSupport.py
+
     def __class_init__(self):
         try:    mt=list(self.meta_types)
         except: mt=[]