Updated tablist carousel example

I have updated the tablist carousel example to use a single javascript "class" based on my understanding of the new coding practices and made some changes to improve focus styling in high contrast modes.
https://raw.githack.com/w3c/aria-practices/issue955-add-tabbed-carousel-example/examples/carousel/carousel-2-tablist.html

So please review the code and high contrast usability.

I have not had a chance to review the changes requested for the regression tests.

Jon


Jon Gunderson, Ph.D., CPWA
Coordinator of Accessible IT Group
University of Illinois at Urbana/Champaign
1207 S. Oak Street
Champaign, IL 61820

www: https://go.illinois.edu/jongund