[gdm] chooser: Don't use deprecated GtkStock

[Robert Ancell <rancell src gnome org>]

commit dfd6f1466b3acb3f0c9d31244d4ab05dca662b7f
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Dec 5 15:14:02 2017 +1300

    chooser: Don't use deprecated GtkStock

 chooser/gdm-host-chooser-dialog.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/chooser/gdm-host-chooser-dialog.c b/chooser/gdm-host-chooser-dialog.c
index b9581a3..1729fd3 100644
--- a/chooser/gdm-host-chooser-dialog.c
+++ b/chooser/gdm-host-chooser-dialog.c
@@ -137,9 +137,9 @@ gdm_host_chooser_dialog_constructor (GType                  type,
         gtk_container_set_border_width (GTK_CONTAINER (dialog->priv->chooser_widget), 5);
 
         gtk_dialog_add_buttons (GTK_DIALOG (dialog),
-                                GTK_STOCK_REFRESH, GTK_RESPONSE_APPLY,
-                                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
-                                GTK_STOCK_CONNECT, GTK_RESPONSE_OK,
+                                _("_Refresh"), GTK_RESPONSE_APPLY,
+                                _("_Cancel"), GTK_RESPONSE_CANCEL,
+                                _("C_onnect"), GTK_RESPONSE_OK,
                                 NULL);
 
         gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_CENTER_ALWAYS);