Author: Dan Poltawski
MDL-56832 theme_boost: Mention CSS in setting description
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bc2aaef4fa9085d1cd90a553d030239d6f794686
http://github.com/moodle/moodle/commit/bc2aaef4fa9085d1cd90a553d030239d6f794686
+ 3.2 en [rawscss_desc,theme_boost]