Author: Rossiani Wijaya
MDL-27955 lesson module: fixed error for reviewing lesson and update string to continue or finish reviewing
http://git.moodle.org/gw?p=moodle.git;a=commit;h=abd5c24e28d6cbb94e408f09ee2c5661cf953360
http://github.com/moodle/moodle/commit/abd5c24e28d6cbb94e408f09ee2c5661cf953360
+ 2.1 en [continuetoanswer,mod_lesson]
+ 2.1 en [submit,mod_lesson]