Sanitize vessel filenames

[HebaruSan]

Hi @dkavolis! A user posted a log on the forum, and I noticed this while investigating:

https://forum.kerbalspaceprogram.com/index.php?/topic/206468-having-unexpected-mark-stack-overflow-and-other-unexpected-crashes-in-a-modded-install/

Also submitted Boris-Barboris/AtmosphereAutopilot#29 for the same problem in another mod.

Problem

If a user on Windows puts a " character in a vessel's name, this is seen in the log:

[EXC 16:28:19.888] ArgumentException: Illegal characters in path.
    System.IO.Path.Combine (System.String path1, System.String path2) (at <9577ac7a62ef43179789031239ba8798>:0)
    FerramAerospaceResearch.FARGUI.FARFlightGUI.FlightDataLogger.GetFilename () (at <5703ae4062a541a09eeee98e1716f5d5>:0)
    FerramAerospaceResearch.FARGUI.FARFlightGUI.FlightDataLogger.CreateLogger (Vessel vessel) (at <5703ae4062a541a09eeee98e1716f5d5>:0)
    FerramAerospaceResearch.FARGUI.FARFlightGUI.FlightGUI.OnStart () (at <5703ae4062a541a09eeee98e1716f5d5>:0)
    VesselModule.Start () (at <39c0323fb6b449a4aaf3465c00ed3c8d>:0)
    UnityEngine.DebugLogHandler:LogException(Exception, Object)
    ModuleManager.UnityLogHandle.InterceptLogHandler:LogException(Exception, Object)
    UnityEngine.Debug:CallOverridenDebugHandler(Exception, Object)

This causes the serialization to fail, which may be cascading into other problems as well:

I have indeed noticed strange behavior on the behalf of FAR (as in the GUI not displaying any information)

Cause

Windows doesn't allow certain characters in filenames, including ", and FARc is trying to put user input into a filename without sanitizing it.

Changes

Now this filename is passed through KSPUtil.SanitizeFilename before use (the same thing the stock game does with .craft files), so it will not contain illegal characters.

[dkavolis]

Thanks for the PR!