"Multi-Repeat Enrolments" Template - Hide/Remove outdated enrolment periods

Emailing out a template to a student,  that pulls in multiple "classes" enrolment periods. 

Individual contact > Actions > template: Choose a template window displays a VERY long list of all enrolment periods "classes" (see screenshot below).

Would like a feature added that enables to hide/remove some of the inactive items in this list. I.e. we are only working with the 2021 periods, so would like to be able to archive/hide/remove 2017 to 2020 enrolment periods.