g_signal_connect (G_OBJECT (priv->account_serviceprovider_picker), "value-changed",
G_CALLBACK (on_picker_button_value_changed), self);
gtk_box_pack_start (GTK_BOX (box), priv->account_serviceprovider_picker, FALSE, FALSE, MODEST_MARGIN_HALF);
g_signal_connect (G_OBJECT (priv->account_serviceprovider_picker), "value-changed",
G_CALLBACK (on_picker_button_value_changed), self);
gtk_box_pack_start (GTK_BOX (box), priv->account_serviceprovider_picker, FALSE, FALSE, MODEST_MARGIN_HALF);