Add highLatency property to LinkConfiguration

src/comm/LinkConfiguration.cc

src/comm/LinkConfiguration.h

src/comm/LinkInterface.cc

src/comm/SerialLink.h

src/comm/TCPLink.h

src/comm/UDPLink.h

src/ui/preferences/SerialSettings.qml

src/ui/preferences/TcpSettings.qml

src/ui/preferences/UdpSettings.qml