Form/PageSheet on iOS doesn't work that nicely

[Tommigun1980]

Hi and thanks for a nice component.

There is a problem on iOS though when the page is a form sheet or a page sheet - dragging the slider should cancel the event propagation, as right now the page will be panned up or down when the slider is being panned if there's even minute vertical movement (which there always is). This makes form and page sheets essentially not compatible with the range slider as it's too hard to use.

Thanks.

[Tommigun1980]

I made a pull request fixing this. It would be awesome if it could be merged and a new package published.

Thanks so much!