[imp] How can I change the display name of "forwards"?

[JackyC at umac.mo]

Hi all,

I would like to ask the how can I change the display name of the 
"forwards".
It is shown as an icon and text (that the one I want to change, which is 
under the icon of "forwards") at the top icons list of IMP inbox page.
The text of "forwards" is "forwards" which is confused with it does, and I 
would like to change it to "Auto Forwards".
I have tried to change the horde/config/registry.php, but it doesn't take 
effect.

I'm using IMP 4.1.3

Thank you very much!

Yours Sincerely,
Jacky, Hoi Kei Chan