Florence Welch ramps up the melodrama in “Queen of Peace/Long & Lost,” a 10-minute short film paired to two tracks from her recent LP, How Big How Blue How Beautiful. The latest installment of Welch’s “Odyssey” saga, created with director Vincent Haycock, finds the singer exploring weighty themes – loss of innocence, male brutality, familial struggle – against the wind-swept backdrop of Scottish isle Easdale.