Indicate if steady-state is reached during evaluation

[deslaughter]

In the Evaluate section, progress bars are displayed during the time domain simulation. If the steady-state calculation fails to converge, then OpenFAST will perform the linearization with the data available, which can lead to bad results if the simulation is not close to steady state. However, there is no indication to the user if steady-state convergence is reached.

This issue proposes adding a feature that indicates to the user if the steady-state convergence does not occur. An initial thought would be to turn the time domain simulation progress bar to a different color, like yellow, to warn the user that the linearization results for that operating point may not be correct.