Remove explicit record name from export of relation field

This provides the same format as the import.

sao/src/window.js

@@ -2259,10 +2259,6 @@
         },
         sel_field: function(name) {
             var long_string = this.fields[name].long_string;
-            var relation = this.fields[name].relation;
-            if (relation) {
-                name += '/rec_name';
-            }
             var node = jQuery('<li/>', {
                 'path': name,
                 'class': 'draggable-handle',

tryton/tryton/gui/window/win_export.py

@@ -356,9 +356,7 @@ class WinExport(WinCSV, InfoBar):
             values.get('ignore_search_limit'))
 
     def sel_field(self, name):
-        string_, relation = self.fields[name]
-        if relation:
-            name += '/rec_name'
+        string_ = self.fields[name][0]
         self.model2.append((string_, name))
 
     def response(self, dialog, response):