“Downton Abbey” star Elizabeth McGovern had an unlady-like conundrum when her luggage was lost en route from London to the premiere of her TriBeCa movie, “Cheerful Weather for the Wedding.” “I had no idea what to do,” she was heard saying at a Roc restaurant and Wines of Argentina after-party. “Project Runway” finalist Daniel Vosovic sent her a chic little black dress on short notice. The film by Donald Rice is set in the English countryside in 1932 and co-stars Felicity Jones.