Bugfix in "ProjectView": Simulation summary dialog was show even if corresponding checkbox was deactivated

This bug arose because
1. "VadereConfig" did not contain the key "Project.simulationResult.show".
2. But, "ProjectView" (GUI) and "ProjectViewModel" (the underlying model)
   retrieved "Project.simulationResult.show" from config (which was not present)
   but both classes used different default values.