The reference fields haven't been correctly implemented with the new views.
This commit restores their behaviour.
Note that an small improvement has been introduced in this commit.
Before saas-16, a `name_get` was done for each record (so 80 if the field
was displayed in a full list view), which is not optimal. The calls are now
batched by model (so one `name_get` by model appearing in the field values).