HowTo restore "BackSpace" in Nautilus Ubuntu

Some of you are used to navigate the folders using "BackSpace" to go up one level. Well, in the latest versions of Ubuntu that functionality has been replaced by the combination "Alt + Arrow Up".
There's a way though to restore the old "BackSpace" to what your habits are. And it's pretty simple.

Open the terminal ("CTRL + ALT + T") and type

sudo gedit .config/nautilus/accels

Scroll to the end of the file and add the following line

(gtk_accel_path "/ShellActions/Up" "BackSpace") 

Unlike the other lines, this one doesn't need any ";" character

Then save the file and reboot the system. 
You're all set!