#23 mode taken into account in watersteam sinkP and sourceP

Closes #23

mode was not taken into account in WaterSteam SourceP and SinkP, but it is the case in Fluid:

if option_temperature then
    T = ISpecificEnthalpyOrTemperature.signal;
    h = ThermoSysPro.Properties.Fluid.SpecificEnthalpy_PT(P, T, fluid, mode, Xco2, Xh2o, Xo2, Xso2);
  else
    h = ISpecificEnthalpyOrTemperature.signal;
    T = ThermoSysPro.Properties.Fluid.Temperature_Ph(P, h, fluid, mode, Xco2, Xh2o, Xo2, Xso2);
  end if;