Crash when selecting an integration time for trajectories with incomplete data
The integration times in the Trajectory Actor UI seem to consist of all available valid times for this forecast. However, it is not given that (especially later) time steps of the forecast do not contain required fields. (e.g., omega wind might only be available for the first 72 hours in the grib file, while u,v are available for all times) Setting an integration time where some of the time step do not contain all variables leads to a crash without any helpful message.