Mouse-drag for carousel moves

[slightlyoff]

Something that's frustrating with current CSS while trying to implement carousels is that scroll snap allows for touch dragging to work well with carousels implemented this way, but pointers (mice) can't drag scroller contents. It would be good for there to be a new analogue to touch-action to enable mouse dragging for carousel scroll containers.

[flackr]

Yup, absolutely, I've filed w3c/pointerevents#512 to try to explore this.