notification: use viewargs for notif_entity_updated instead of transaction_data Now that notifications use separate sessions, they can't rely on the original transaction_data being around, so pass the data through view arguments instead, so the notification view knows what changed on updated entities. Closes #2936180

Add some entities
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As manager, you can access to entity creation forms by using the `site management`_ page.

.. _`site management`: manage

As regular user, the index page or the action box may propose some links to create entities according to the context.