fix https://www.logilab.net/cwo/ticket/481727
the pb lies more in sqlite library, since it's fixed by opening the
sqlite database using an absolute path.
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.