* Create SRLogger that extends from the default Logger class. This
logger outputs the feedback to a sr-only ARIA live region to allow
screen readers to announce the feedback from mutations.
* Update the course editor to use the SRLogger.
* Create a mechanism for logging mutation feedbacks.
* The mutation feedbacks are displayed as a toast by default.
* Apply this logging mechanism on the course homepage to provide
feedback for the results of actions performed on course modules and
course sections.
When bulk-updating course module visibility, set_coursemodule_visibily
was triggering a partial cache purge and rebuild for each course module.
This potentially led to 2 cache sets each requiring a lock to be
acquired and released per course module, plus any other cache updates
for other changes to the course in the same request.
This adds a new $rebuildcache paramter to the
set_coursemodule_visibilty, which is true by default to retain the
existing behaviour. If set false, it will skip doing the partial purge
and rebuild for that course module, and it is up to the calling code to
ensure the cache is updated as requried.
To assist with this, there is a new
course_modinfo::purge_course_module_cache_multiple() method, which
allows multiple course modules to be purged from the cache in a single
cache set.
* When reloading a section, we also forced the reloading of
course modules, resulting in doing the same work twice (once for
the section reload and once for the course module reload)
* Debounce the reloading process so prevent unwanted duplicate
reloads
MDL-78806 core: Remove redundant site name on page titles
* With the site name now being appended to the page titles, there
is no need to manually append the page titles.
* Create 'editing' versions of the coursetitle and coursesectiontitle
lang strings used for the page title of the course homepage and use
these when editing mode is turned on to provide immediate information
to users, especially screen reader users, the current state of the
course homepage.
Using the .disabled class for the course module or section that is
being moved does not have sufficient colour contrast against the
background, especially when it is being highlighted.
So instead of using .disabled, just use Bootstrap classes .text-body
and .font-italic which renders the cm/section to be moved in normal
font colour while preserving its italicised look.
