Author: Jun Pataleta
MDL-65937 mod_lesson: Use new core/checkbox_toggleall
Plus some refactoring on the cell of the attempts column.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ae612a53343a7eea95ca6d1304ec3af1a125dcaf
http://github.com/moodle/moodle/commit/ae612a53343a7eea95ca6d1304ec3af1a125dcaf
+ 3.8 en [deselectallattempts,mod_lesson]
+ 3.8 en [selectallattempts,mod_lesson]
+ 3.8 en [withselectedattempts,mod_lesson]