Refs #1579. First cut a swapping of config directories.

Due to the way Qt deals with the settings files, the swap must occur
on shutdown.
Refs #1579. Putting settings switch back.
Refs #1579. Handling Windows registry copying.
Refs #1579. Remove debugging.
Refs #1579. Make comments commensurate with new config location.
Refs #1579. Adding documentation for function.
Merge remote branch 'origin/feature/1579_rename_config_dir'