A Spitfire donated to Stoke-on-Trent by the RAF in 1972 is set to go back on public display in a new glass-fronted £5.4 million ($7.5 million)  gallery as an “anything’s possible” symbol of hope. The aircraft’s official unveiling in a 3,800 sq ft (350 square meter) extension to the Potteries Museum and Art Gallery on…