Make symlinks of default files relative

[c-p-schmidt]

The symbolic links have been set to absolute paths; thus, they only worked on @dragos-ana's workstation.

I changed them to relative paths, and now it also works on my workstation.

[dragos-ana]

Thanks for the fix. Since it also worked previously on my workstation, I think we still need another verification.

EDIT: did not see that auto-merge is enabled, let's just hope this works for everybody ;)