Allow change of task due date with CTA due date change
When I try to move a CTA's due date earlier, I get an error "CTA due date cannot be earlier than task due date". This makes it essentially impossible to move the CTA's date earlier - you have to change all of the task due dates earlier before you can change the master CTA date. When the playbook’s due date for the tasks is set to be the CTA due date, these should be editable together too.