Heaps of flowers and origami cranes to mourn the “Raincoat Man” are piled up along the pavement outside a Hong Kong shopping centre where the man fell to his death while staging an apparent protest against a contentious extradition bill proposed by the government.   Most of the tributes were left by demonstrators taking part in a march on June 16, 2019, when nearly 2 million people took to the streets, according to organisers.   The previous day, the man was seen climbing to the rooftop of…