* Lighten info container.
* Fix colour contrast for the question container by
- Lightening the background a bit
- Darkening the text colour a bit
- Making sure the link colour has good colour contrast against the
question text.
* Fix colour contrast for the comments container by
- Lightening the text colour a bit
- Darkening the link colour a bit for better colour contrast against
the feedback text.
The current red, blue, and green colours achieve the minimum colour
contrast against a white background. However, when they're against
coloured background, text with these colours will easily fail the
4.5:1 contrast ratio requirement for Level AA.
The updated colours now have the following contrast ratio against a
white background:
* Blue - #0f6fc5 (5.12:1, from 4.58:1)
* Green - #357a32 (5.27:1, from 4.63:1)
* Red - #ca3120 (5.29:1, from 4.59:1)
Links and normal text should have at least a colour contrast ratio
of 3:1. To achieve this, $body-color will be using the darker
shade of gray $gray-900 (#212529).
* Darkened the link and clickable icon colours inside coloured events.
* Added borders around event colour indicators inside the month-view of
the calendar for better contrast against the white background.
Use $gray-600 for a darker text colour in the course select box.
This also makes the colour consistent with the view selector which
also uses $gray-600.
Increase the opacity for the sass variable $navbar-light-color a
little bit in order to achieve an acceptable colour contrast against
the white background.
Where an element, like an `alert`, is closed it is removed from the DOM
before the event fires (this is a correct behaviour).
This means that the final event confirming that the action happened
(i.e. close => closed) fires, but does not bubble up the DOM to the
document.body.
This change moves the end event listener to only be added after a start
event has been fired, and to attach directly to the HTMLElement where it
will be fired. This means that the Event handler will still be called,
even though it has been removed from the DOM, because it does not need
to bubble up to the body.
* Added aria-label for category single select element when on Courses
view mode.
* Fix correct labelling of custom control checkboxes. Instead of adding
aria-label in the label element, add an sr-only span within the label.
* Remove inappropriate 'group' role for the list of courses.
The list of courses is not being rendered as a tree structure
so adding a 'group' role to the list of courses is not really
necessary.
* Add aria-label for the search courses field.
* Add legend for the search courses fieldset.
* Use the primary colour for the category selection highlight instead
of the info colour.
* Changed the labels for the up/down icons using moveup/movedown
lang strings.
