Call directly the callback when search has a unique result

We can not rely on the response because it is using the selection which may not
be filled.

issue11632
review411541003
(grafted from 3213c545da10db54ded880a5dd98f6d90bbf5822)

--HG--
branch : 6.0

tryton/gui/window/view_form/view/form_gtk/many2many.py

@@ -164,7 +164,10 @@ class Many2Many(Widget):
             title=self.attrs.get('string'))
         win.screen.search_filter(quote(value))
         if len(win.screen.group) == 1:
-            win.response(None, Gtk.ResponseType.OK)
+            callback([
+                    (r.id, r.value.get('rec_name', ''))
+                    for r in win.screen.group])
+            win.destroy()
         else:
             win.show()
 

tryton/gui/window/view_form/view/form_gtk/many2one.py

@@ -136,7 +136,10 @@ class Many2One(Widget):
                     exclude_field=self.attrs.get('relation_field'))
                 win.screen.search_filter(quote(text))
                 if len(win.screen.group) == 1:
-                    win.response(None, Gtk.ResponseType.OK)
+                    callback([
+                            (r.id, r.value.get('rec_name', ''))
+                            for r in win.screen.group])
+                    win.destroy()
                 else:
                     win.show()
                 return