#34 See/edit contens object in 2.7

[Sebastian Heise]

- Fresh install with PT_CORE.
- Install of PT_DEMO (Just structure, no data)

* User has role: Admin - no other rights.
* Admin has rights to access/edit content objects.
* User does not see content objects (but is supposed to!)

Solution:
* Grant user direct access to content objects.
* Save.
-> user can now see content objects

* Revoke user access again, so that rights are passed down from admin role again.
-> user can still see content objects (and is supposed to).