In the "Editable Email Notification" section of my matrix job configuration page, there is the "Trigger for matrix projects" dropdown. When I make changes elsewhere in the job config page then "Save" the page, then reopen it, this field is always reset to "Trigger for parent and each configuration". I am not able to select "Trigger only the parent job". When the job runs, it ALWAYS sends emails for each configuration run and the parent run.