The methods core_courseformat\base::set_section_number() and
core_courseformat\base:: get_section_number() have been deprecated
and replaced by core_courseformat\base::set_sectionnum() and
core_courseformat\base::get_sectionnum().
The new methods use the null value when all the sections must be
displayed (instead of 0). That way, section 0, can be displayed on
a single page too.
The highlight and unhighlight sections applies only to the format_topics
plugins. With this commit all the related code is migrated to reactive
component and format_topics extend the current course editor to add all
the logic
Sara Arjona