* Added styles to curriculum page for mobile
* Fix: Added styles to curriculum page for mobile browsers
* reverted
* Fixed: Added styles to curriculum page for mobile browsers
Resolves https://github.com/freeCodeCamp/freeCodeCamp/issues/17520
I fixed the spelling of "arithemtic" to "arithmetic"
Also, I found a misplaced modifier in "basic programming concepts in JavaScript, which range"
The word "concepts" needs the modifier: "which"
Added a script tag to the header of the page in src/head/index.js via src/head/mathjax.js. Modified Side-Panel.js so that mathematical functions are rendered properly in the Rosetta Code problems. Had to use the CDN because I couldn't get the NPM package working, and a local package like the one used in Arcade Mode would be ignored if put into the public folder. We could probably use that local package if there's a better place to store it.
Since MathJax is set up currently to interpret anything between $...$ or $$...$$ as a math function, we will need to check some of the other problems that use those symbols on the same line.
* fix 'Testing with Chai' 404 error
* Remove service worker and unregister old workers from clients
* Fix block name in QA and Chai intro
* Move the map to the index page
* Split test commands, have travis run format on test
* Only expand the first block
* Remove some margin from p tags on the index page
* Learn -> Curriculum link in header
* UI Fixes
* Use webpack plugin to destroy sercive worker
* Add spinner for unknown user state
* Fix map placement
* Fix vcurriculum button clicks
* Reworked the way that the editor and output are rendered when the browser window / panes are resized horizontally. Moved the ReflexContainer elements into the editors variable to get vertical resizing working. Also, removed the margin-bottom property from the .editor class in classic.css and set overflow to hidden in .react-monaco-editor-container. By doing this it prevents the browser scrollbars from appearing and removes the white space at the bottom of the editor / output panes when scrolling all the way down past the code.