Creates a new GMenuItem.
If label is non-NULL it is used to set the "label" attribute of the
new item.
If detailed_action is non-NULL it is used to set the "action" and
possibly the "target" attribute of the new item. See
g_menu_item_set_detailed_action() for more information.
Since 2.32
Creates a new GMenuItem. If label is non-NULL it is used to set the "label" attribute of the new item. If detailed_action is non-NULL it is used to set the "action" and possibly the "target" attribute of the new item. See g_menu_item_set_detailed_action() for more information. Since 2.32