Please provide one more environment level for private environments

Current environments have this hierarchy: • base environment (public) * sub-environment (public/private) * folder environment (public) * ... * folder environment (public) A common setup for test scripts is to have these levels of data: • Common data that can be shared between environments (e.g. preload user names) • Environment-specific public data that can be committed into the source repository (e.g. cloud URLs) • Environment-specific private data (e.g. authentication). Today, only sub-environments can be private, which means that environment-specific public data can only go into folder environments, which is not a usable configuration because folder environments cannot be switched like actual environments and one would have to move requests from a folder to a folder to use those environments. Folders also present other challenges, like base environment can recursively reference variables in sub-environments, but not in f…