Author: Katie Ransom
MDL-69739 tool_usertours: Add tour-level CSS selector
http://git.moodle.org/gw?p=moodle.git;a=commit;h=51caf76655ba85b3edb4d45ce1aaf57945d49a7c
http://github.com/moodle/moodle/commit/51caf76655ba85b3edb4d45ce1aaf57945d49a7c
+ 4.0 en [filter_cssselector,tool_usertours]
+ 4.0 en [filter_cssselector_help,tool_usertours]