Disposition can't be reset to normal without changing the label text

[Alberto Mardegan]

If you have a DBusMenu item and do

dbusmenu_menuitem_property_set (menu_item
                                    DBUSMENU_MENUITEM_PROP_DISPOSITION,
                                    DBUSMENU_MENUITEM_DISPOSITION_ALERT);

the menu item becomes red, as expected. However, if you later do

dbusmenu_menuitem_property_set (menu_item
                                    DBUSMENU_MENUITEM_PROP_DISPOSITION,
                                    DBUSMENU_MENUITEM_DISPOSITION_NORMAL);

the item is not set to its normal color, unless you change the label text as well. The Genericmenuitem class in libdbusmenu-gtk/genericmenuitem.c should remember the string which was set as label by the client, and not re-read it from the Gtk label widget (where it will have the additional <span> elements for the colouring).