Implemented that feature in 0.13.0 which should be available in extras-devel shortly.
Unfortunately, this version breaks compatibility with older clock styles.

So, all clock styles need to be changed accordingly.
The change affects the constructor which now uses three (including self) parameters.
If you use the constructor for initialization etc. you need to forward the third parameter to the super constructor to make your clock work again.
If you do nothing else in your constructor except calling the super constructor you could as well delete the constructor.

Edit:
@NightShift79
Yes it is.
To be accurate it is: "/apps/osso/hildon-desktop/views/current".
It's the plural "views".
But well this is pretty much nitpicking.