Purpose of this commit is to lessen difference in layouting between courses
being documentation or training. Indeed we want a smoother user experience.
In this commit we
* use the left bar with course information on course page view on both
courses;
* unify menus and tabs;
* better integrate sale and forum as everything is not a single layout;
* move Type under Display to have all display related options within the
same option group;
* unify display, notably remove "+" on "+ Add Tags";
LINKS
Task ID-2275688
PR odoo/odoo#65454
Co-Authored-By: Mariska Archielli <ram@odoo.com>
Co-Authored-By: Thibault Delavallée <tde@odoo.com>