I also just tried it and Yes, it works for me too!
I am not sure why it did not work previously. I just got
Script execution of rule with UID ‘testbutton-1’ failed: The name ‘setImage’ cannot be resolved to an item or type
but ow it works fine. Did something change in the code? Never mind, it works now, also for me.
Thanks guys for the relive of this thread. Now I can continue to use this Notification system.