In Wild Rose, Jessie Buckley (The Woman in White) stars as a young Scottish mother fresh out of prison, who dreams of becoming a country singer. The movie, from director Tom Harper (Peaky Blinders, War & Peace) and writer Nicole Taylor (Three Girls, The Hour) is far more uplifting than that short description may make it sound (she was in prison for throwing bags of heroin over the prison walls to fund her dream, no less -- it's a comedy as well!) In the buoyant new trailer, we see Buckley's Rose struggling to achieve her aspirations while also needing …