MILAN (Reuters) - Mediaset's operating profit fell 47% in the first quarter hurt by a drop in advertising revenue as the market plummeted in March due to the coronavirus outbreak, Italy's top commercial broadcaster said on Wednesday.Mediaset has to cope with coronavirus-hit companies postponing or scrapping advertising spending after the government imposed a nationwide lockdown to curb the spread of the virus after the outbreak first emerged in February. The Milan-based group, controlled by the..