Jonesboro, Ark., came through a devastating tornado without any deaths, partly because businesses were closed and people were sheltered at home from the coronavirus.Residents in Jonesboro, Ark., cleaning up an area that was devastated by a tornado on Saturday.Credit...Houston Cofield for The New York TimesMarch 29, 2020, 7:05 p.m. ETATLANTA — Some in Jonesboro, Ark.,…