When a theme is customized to be 'boxed', the website is not full width
in mobile, and there is an horizontal scrolling.
To fix this issue, we removed only set the width of the "wrapwrap" div
to 85% when the screen is bigger than a phone.
* Convert some CSS to LESS
* Split/Join LESS files
* Remove duplicates between website and web_editor
* UI improvements
* Allow simple customizations thanks to LESS var&mixins for website
Christophe Simonis