MIKE 3 hotfix 23-11-2018

An error has been corrected in the implementation of the vertical convective terms in MIKE 3 Wave Model FM. In addition the settings for the precondition method used for solving the Poisson equation in MIKE 3 Wave Model FM has been changed. Now a 2-level incomplete LU factorization is used, which improve the convergence also for cases with large variation in the layer thickness for the vertical discretization.