In Sakai 11, in Lessons, when using Add Content -> Add Content Links, instructors had the option to enter the Item Name or title for their URL instead of displaying the full URL to students. See attached screenshot.
In 12 and 13/19, the Item Name field, where the instructor would enter this title or file name, has been removed. Instructors must now save the URL, then edit the item to update the name. See attached screenshots.
FYI: This is a regression-this is the way we had to add URL titles in Lessons in Sakai 2.9.