Hong Kong’s business district slowly returned to normal on Monday after police and protesters clashed overnight.Roads were cleared for vehicles in the morning, the MTR ran as usual, and rubbish was swept aside in the hours before people arrived for work in Sheung Wan and Central.Services at Yuen Long MTR station also resumed normal service, and opened at 5.44am after being the scene of unprecedented late-night violence, in which men in white T-shirts attacked black-clad protesters and…