Create Window Game Monitor.

This replaced CrashDialog with OpenRA.exe that wraps OpenRA.Game.exe

Disables calls to CrashDialog.exe from OpenRA.Game.exe
I'd like to remove this checkbox and associated setting.  The reason we added this was to stop the error dialog from eating the exceptions that we wanted to be caught by external debuggers, but that is no longer necessary (just run the game directly when debugging).