Shall be refactored, along with the database structure

This reverts commit b07daf86.

This line usually occurs if the account_type is not set correctly, hence
if the user has been logged-out and tries to reload the access
restricted page (back in the browser history).

Set the two lists, one for the users which will search only the marks,
and one for the references.

Only show the marks related to the current segment in the afis segment
edit page. If a mark contains multiple zones, the image is displayed on
all related segments.

This reverts commit a1c1802c.