[#172271502] Bug Fix: Undo of toggling case card to case table crashes
[#172271502] Bug Fix: Undo of toggling case card to case table crashes

- Was using an invalid method of geting to the table in the undo portion

concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap