Sticker: Improve the runtime exception feedback.
Sticker: Improve the runtime exception feedback.

This also removes the runtime checks from the ratings methods,
they will hit the exception when they enter a sticker management
method.

hurzl/dmix,jcnoir/dmix,hurzl/dmix,abarisain/dmix,abarisain/dmix,joansmith/dmix,jcnoir/dmix,0359xiaodong/dmix,0359xiaodong/dmix,joansmith/dmix