Display course name in unenroll popup.

Only the course number was displayed in the course unenrollment
confirmation popup dialog.

Include full course display name to make it more user friendly.

lms/static/js/dashboard/legacy.js

@@ -128,6 +128,7 @@
         $(".action-unenroll").click(function(event) {
             $("#unenroll_course_id").val( $(event.target).data("course-id") );
             $("#unenroll_course_number").text( $(event.target).data("course-number") );
+            $("#unenroll_course_name").text( $(event.target).data("course-name") );
         });
 
         $('#unenroll_form').on('ajax:complete', function(event, xhr) {
@@ -190,6 +191,7 @@
         $("#unregister_block_course").click( function(event) {
             $("#unenroll_course_id").val($(event.target).data("course-id"));
             $("#unenroll_course_number").text($(event.target).data("course-number"));
+            $("#unenroll_course_name").text($(event.target).data("course-name"));
         });
     };