Adding more skip button options

I found for my use case I needed a way to make the buttons in the bottom left and right be a back or next or finish button.  I added an enum type that allows the developer to specify if they want to show both buttons, 1 button or use it the way it was originally intended. Eventually I am sure we could modify this more to include each type of workflow a dev would need.

I  also purposely did not rename the buttons from SkipButton to keep compatibility that other people may have. I also made the original workflow the standard one.