hardcode a different label for new links to folder (#4456)

plone/dexterity/browser/add.py

@@ -130,6 +130,8 @@ class DefaultAddForm(DexterityExtensibleForm, form.AddForm):
         if self.context.portal_type == 'pfwbgedfolder':
             return _(u"${folder}: Ajouter ${name}", mapping={'name': type_name,
                 'folder': self.context.title})
+        if portal_type == 'pfwbgedlink':
+            return _(u"Classer dans le dossier")
         return _(u"Add ${name}", mapping={'name': type_name})