//column->pack_start(history_tree_model.icon, false); //false = don't expand.
column->pack_start(*text_cr);
column->add_attribute(text_cr->property_text(),history_tree_model.name);
column->add_attribute(text_cr->property_foreground_set(),history_tree_model.is_redo);
//column->pack_start(history_tree_model.icon, false); //false = don't expand.
column->pack_start(*text_cr);
column->add_attribute(text_cr->property_text(),history_tree_model.name);
column->add_attribute(text_cr->property_foreground_set(),history_tree_model.is_redo);