fix migration script for activities, seen by user and various other modules
fix migration script for activities, seen by user and various other modules

Coursemology/coursemology.org,nusedutech/coursemology.org,allenwq/coursemology.org,Coursemology/coursemology.org,nusedutech/coursemology.org,nnamon/coursemology.org,allenwq/coursemology.org,dariusf/coursemology.org,allenwq/coursemology.org,dariusf/coursemology.org,dariusf/coursemology.org,nnamon/coursemology.org,Coursemology/coursemology.org,allenwq/coursemology.org,nusedutech/coursemology.org,nusedutech/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,nusedutech/coursemology.org,allenwq/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,nnamon/coursemology.org,nnamon/coursemology.org,nnamon/coursemology.org