SAK-22246 When there is no tool configuration made don't display ()

Lessons doesn't have any additional configuration but allows users to change it's name so that when you have multiple copies of the tool in the site each one has a unique name.

git-svn-id: https://source.sakaiproject.org/svn/site-manage/trunk@120066 66ffb92e-73f9-0310-93c1-f5514f145a0a