move MathJax config to challengePanel component
move MathJax config to challengePanel component

freeCodeCamp/arcade-mode,kevinnorris/arcade-mode,kevinnorris/arcade-mode,freeCodeCamp/arcade-mode,kevinnorris/arcade-mode,kevinnorris/arcade-mode,freeCodeCamp/arcade-mode,freeCodeCamp/arcade-mode