Tom Fulcher

I was hoping we could add an `eventSource` or similar to afterSlide so we can check if the slide event was fired because of user click/drag vs an auto slide...

### Component name Range Slider ### Component description Range Slider allow users to select a value along a subjective range. I am aware it is already in Polaris [(https://polaris.shopify.com/components/selection-and-input/range-slider)](https://polaris.shopify.com/components/selection-and-input/range-slider) but...

**What kind of change does this PR introduce?** (check one with "x") - [ ] Bugfix - [ ] Feature - [ ] Code style update (formatting, local variables) -...