Reduce file system size pressure

[pierre-rouleau]

With the support for independent terminal/TTY and graphics customization two set of directories are created for elpa and utils and files are stored in both doubling file storage size requirement.

It would help to use a directory to store the sub-directories and files and then store symlinks in the elpa and utils directories.

symlinks are already used for managing startup mode.

However, I have not yet tested all of this on Windows where symlinks may not be available. So this modification should only be done once support for Windows symlink is confirmed or implemented.