Survey icon options

It would be great if we could customise the icons used in the rating and Boolean surveys. I would like to be able to use smileys on a three point rating for instance. It would be great if we could at least have some common icon choices or perhaps use the emoji set or even load in our own svgs.

Besides the fact that thumbs up and down can be seen as offensive in some cultures, this would allow us to be more consistent with our branding.

Thanks

Jonathan