createSimulationForConfiguration() assumed addConfiguration() and
copyConfiguration() would set the new configuration as selected, but
they didn't resulting in simulation based on old configuration, not new
one. Fixed.
addConfiguration() and copyConfiguration() had enough common code that
consolidating them and createSimulationForConfiguration() seemed like a
good idea.
Let FlightConfiguration.copy() create new ID for consistency with
constructor.
09123dd0ce