Simulator GUI: Save form parameters when launching a scenario

[martinmaher]

As a user of the simulator GUI I would like to preserve the form values I enter before launching a scenario so that I can reuse the form values from a previous launch later on without having to re-enter all the data again

Background:

• when testing or retesting a particular scenario the form parameters sometimes differ very little or not at all between each launch. If a tester could decide what forms should be saved when launching a scenario they could then select one of these from a list of saved launches when re-launching later on.