Since the <ul> and <li> elements for listing the quiz questions and
elements are mainly used for layout purposes, it is better to set the
role of these elements to presentation only.
The aria-label for the <li> element is inappropriate and can also cause
confusion to screen reader users. Better to remove this. Though this is
being used in the confirmation modal so better to just change it to a
data attribute.
Since the <ul> and <li> elements for listing the quiz questions and
elements are mainly used for layout purposes, it is better to set the
role of these elements to presentation only.
Add a default sr-only section heading in order to prevent having an
empty heading for the quiz section which is not good for accessibility.
Plus:
- There's also an existing issue where filters are never applied to
section headings on load. This has been fixed in this commit as well.
- Button role added for the edit section button which enables it to
take advantage of the theme highlighting when it receives focus.
If a user drags an activity and press the ALT key, the activity will be
duplicated in the new place instead of simply moved. This behaviour
is quite normal in many softwares and it is a non intrusive usability
improvement.
The courseindex init methods contains static references to the class
name instead of a dynamic "this" reference. This makes harder for format
plugins to extend those classes as they need to override the init method
for no specific reason.
I have opted not to go through any deprecation process for this as there
is not really much we can do about it anyway. There is no loss of
functionality - just a change of where things are served from.
The Yahoo! CDN was only used for http connections as it did not
officially support SSL, and it is not guaranteed to continue existing in
the future since YUI has been deprecated for a number of years now.
Including in this commit:
- Prevent the tour to be displayed if the CSS is disabled by the browser
- Removed redundant tabindex=0 attribute on the target
- Created extra code to re-calculate the suitable position of the tour
- Fixed tour issue in 200% and 400% zoom
- Fixed tour highlight is not correct in 200% and 400%
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
