Request menu don't display the pickup_name field

[iGormilhit]

On the master branch (c8c2fa4), when a connected patron wants to request an available item (or an unavailable item), the request menu shows only one pickup location named "Espaces publics".

The pickup_name should be used, and all available pickup locations should be displayed, not only the one that owns the item.

As @BadrAly mentionned on Gitter, the library name should be displayed, instead of the pickup location name.

Code: https://github.com/rero/rero-ils/blob/master/rero_ils/modules/documents_items/templates/rero_ils/detailed_view_documents_items.html#L200

Print screens:

[iGormilhit]

The same issue occurs on the patron profile view, in the pending tab, 3rd column (pickup library).

[iGormilhit]

Fixed.