"Append to environment" is not working properly

[paulvi]

originally reported by @ihgreenman Ian in #81

It looks like in the "Edit launch configuration properties" window that the "Append to environment" is not working properly; it appears that no matter what that the native environment variables are getting nuked.

[paulvi]

I checked LaunchConfigurationDelegate.java code

Currently append and replace both are not referenced. It passes only specified environment variables making it replace like .