Many users asked it in the Google Moderators pages.
Well … it will be in the next release !
And you’ll be able to change the font size now in the scrollable list (small here).
Warning: it is only for scrollable list. There is no room on normal and classic list widget types for this new icon.
If you are using Sense, don’t forget to update your skin. It is also advised to reboot the phone if you have misplaced icons.