Sane defaults to address: Deleted users keep the roles they had

see plone/Products.CMFPlone#3937

src/plone/base/interfaces/controlpanel.py

@@ -1120,7 +1120,7 @@ class ISecuritySchema(Interface):
             "saving this form will fail. You can use the "
             "@@migrate-to-emaillogin page to show the duplicates."
         ),
-        default=False,
+        default=True,
         required=False,
     )
 
@@ -1132,7 +1132,7 @@ class ISecuritySchema(Interface):
             "login name, or when using the email address as login name we "
             "generate a user id based on the fullname."
         ),
-        default=False,
+        default=True,
         required=False,
     )