PURPOSE

Currently eLearning lacks feature of having downloadable resources on
lessons. Indeed for example teachers would like to attach zip files or
other resources linked to a given lesson.

SPECIFICATIONS

You can now allow the user to download the slide content for pdf and image
slides. A new icon will be visible next to the fullscreen button on the pdf
viewer.

Course maintainers can also add additional resources to a slide which will be
available to download for the user.

Task ID 2066741
PR #39890

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>