TARTU, Estonia (Reuters) - Estonian sauna companies say orders have been flying in since the coronavirus pandemic was declared, crediting a renewed focus on wellbeing for the boost to a tradition they say is as old as Finland's but less well known."This was quite surprising, even a bit scary," Siim Nellis, Chief Executive of sauna stove maker Huum, told Reuters, referring to a 221% increase in sales from a year ago in March.Iglucraft, which makes hand built, igloo-shaped saunas covered with..