Course item has no border in on course list (Category Page (ROOT/courses/)) in Boost Theme

While the "Available Courses" on the "Home" page are separated by a border, the display of courses on the www.moodleroot/course/ page does not have this separation.

In this case, it is hard to determine where the information from one course ends and that from another one begins.

Especially, it is easy to misinterpret the "Teacher" from the course above to be the "Teacher" from the course beneath.

A solution would be to have the same border style as the courses in the "Available Courses" section on the site's "Home" page.