Fix the Class Merge View crash issue (on live view)

[cbradyatinquire]

When "Live" is active on the merged view, changes to the objects from students freeze the teacher.

[DinoPuppo]

Test whether a high level of activity in the groups (in terms of creation/update of points) causes the "Live" merged view app to crash

[cbradyatinquire]

this seems to work in our testing. I think ready for closing and pushing to Master/Production