track_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
track_display.get_column (0)->set_expand(true);
track_display.get_column (1)->set_expand(false);
+ track_display.get_column (0)->set_sizing (Gtk::TREE_VIEW_COLUMN_FIXED);
track_display.set_name (X_("EditGroupList"));
track_display.get_selection()->set_mode (Gtk::SELECTION_NONE);
track_display.set_reorderable (true);