chore(package): update ember-modal-dialog to version 2.4.1
chore(package): update ember-modal-dialog to version 2.4.1

Closes #2653
thecoolestguy/frontend,djvoa12/frontend,dartajax/frontend,jrjohnson/frontend,jrjohnson/frontend,thecoolestguy/frontend,ilios/frontend,dartajax/frontend,ilios/frontend,djvoa12/frontend