default value for from_dp switch in PartialGenericPipeFlow (Modelica.Fluid)

[R-M-F]

The default value for the switch from_dp in PartialGenericPipeFlow, which determines calculation direction for pressure drop, or respectively mass flow calculation, is
from_dp = momentumDynamics >= Types.Dynamics.SteadyStateInitial
In case of
momentumDynamics == Types.Dynamics.SteadyStateInitial
the calculation direction m_flow = f(dp) is chosen, although in all other cases with dynamic momentum balance the direction dp = f(m_flow) is used. This causes additional nonlinear systems (simulation and initialization) as it can be observed in the tester Modelica.Fluid.Examples.BranchingDynamicPipes.
These nonlinear systems in the tester disappear and simulation speed increases if from_dp = False is set manually.
By modifying the default value
from_dp = momentumDynamics > Types.Dynamics.SteadyStateInitial
the calculation direction would be consistent with the other cases with dynamic momentum balance and the more efficient calculation setup is activated without any changes by the user.