With 003d85b instead of getting the name of the relation
field_relation we get field_relation/id.
But the data about the related fields are not gotten all at once when
opening the export modal. They are gotten by clicking on the arrow of
the related record.
So we need to have these /id information saved in the export list,
otherwise for example the related records can be missing when exporting
from an export list, whilst everything was OK without using the saved
export list.
With the previous change, an export list could contain an id and .id
fields for the same relational field, so a change must also be done in
fields_info method used when getting a saved list.
opw-665994
opw-693535
note: adapted forward-port of 8.0's 29be9ae80 which was lost when
merging web enterprise onto web community.
Nicolas Lempereur
734d9b56da