Font Awesome fixed width icons

I found a trick to keep Font Awesome icons aligned (since the width for each of them is not consistent. When you add a custom icon in front of a menu list, the caption often does not line up.

However when you add fa-fw, it does the trick. It would be nice for general users if “fa-fw” is automatically appended to the end of the FA class (before it is injected) so this effect could be automatic.