Git commits in Moodle 2.3.7 by Charles Fulton

commit ba7c052171322bef3cba5e8e09c8f4412c8e48fd
Author: Charles Fulton <mackensen@gmail.com>
Date:   Tue, 26 Mar 2013 04:35:44 +0800
Tag:    v2.3.7

MDL-38700 course: only change visibility if a module moves to a different section