Author: Safat
MDL-78129 communication_matrix: Add support for matrix power level
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e9743431a667b2bb01ca4633d5cddd0b654f57f6
http://github.com/moodle/moodle/commit/e9743431a667b2bb01ca4633d5cddd0b654f57f6
+ 4.3 en [matrix:moderator,communication_matrix]