Do we need to annotate a zope collection (list/dict/tuple) in order to disallow deep update to iterate through its items?

[smanousopoulos]

e.g. in the case of Foo tags (list) we there is no point to let deep update iterate through its items, whereas in other cases such as Foo contacts (list) we need to be able to update a specific list item.

[drmalex07]

The deep updater now respects an allow-partial-update field tag.