[Completion Feedback Message] Suggestions for "Next" and "View"

I would like to suggest "Next" to be Green in color (with a ">" icon to relate to the ">" icon in challenge screen). I also suggest to move this option to the top (since that should be the default behavior after completing a challenge". 

Likewise, "View" should be moved below, with "<" icon to denote going back to the page. I also would suggest it to be "back", instead of "view". As it has the same behavior of the "x" icon above, this button actually isn't even required.