Automatic's outlined to cursor position for Nautilus files navigator.

IDEA: A light grey type of background colored line automaticly linked with the cursor position for nautilus files Navigator.
You can actually notice sometimes this option, on certain website for example (Ubuntu-fr.org, Popller, etc.) and it helps you to find out quickly what you are looking for, in an easiest and nice way. What will be interesting in looking at, belong the repository tree...
To finish, by the help of this focus and emphasis, I will find it personally, an new feature, within the Ubuntu's distribution of the operating system Linux, very useful.