Save Crafts when mods are uninstalled

[Galahir950]

When a mod is uninstalled, you should be able to keep the crafts in your Persistent.sfs file. they will try to load each time you start that save. If you dont want the ship any more, you just go to the tracking station and the craft will have a red button instead of the dark blue. You can abort the flight if you dont want it or you can chose to remove the conflicting part. This will save people a lot trouble when a new update happens.