Support /savereplay silent
Support /savereplay silent

See https://github.com/Zarel/Pokemon-Showdown/commit/41e7c574423a784e8caa33f2694e79cd7d1eb2ec

sirDonovan/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client