The need is to open a link from the Quick Launch in a new window.
When Publishing Features are not activated, we can only edit URL, name of the link and its position.
Saving and clicking on the new link, the URL opens successfully in a new window BUT current page becomes white with the word [Object] ...
So, I tried this trick .. and it works:
The URL will open in a new window and the current page is reloaded onto itself.