As a teacher
I want to be able to duplicate an activity and see the change applied in the course index
so I don't need to reload the page to confirm the changes were properly applied.

Acceptance criteria:

1. All activities whit title are shown in both course index and course main content area for view mode.
2. Labels with no title are only shown in the course main content area for view mode.
3. All activities are shown in both course index and course main content area for edit mode.
4. 1), 2) and 3) acceptance criteria should be consistence when an activity is duplicated on the course main content area.