Hong Kong’s leader faced more calls on Thursday to back down on a controversial extradition bill as one of her own advisers said more safeguards could be introduced to allay public concerns while pro-establishment lawmakers demanded she shelve the plan or at least not rush it through.Pressure continued to mount on Carrie Lam Cheng Yuet-ngor after tens of thousands of Hongkongers took to the street on Sunday to oppose the government proposal, which would allow the transfer of fugitives to any…