Author: Syxton
MDL-50283 rubric: Add duplicate row button
Adds the ability to duplicate a row in a rubric.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e22c8d2ae3fd82174fd8ba11c6ed74ca6aec48f9
http://github.com/moodle/moodle/commit/e22c8d2ae3fd82174fd8ba11c6ed74ca6aec48f9
+ 3.0 en [criterionduplicate,gradingform_rubric]