Expanded and collapsed Block items are not being announced

Issue
Context changes - Expand/collapse zones such as "User", "Calendar", "Navigation", "Settings" are not being announced as opened or closed to screen readers users. It would be useful to rely on aria-live="polite" to tell screen readers if the zones are "live" (opened or closed) or provide another similar mechanism.

Provide guidance - Menu elements in the right sidebar can be activated to open a submenu, but screen reader users are not made aware of this - as these links don't lead anywhere, they should be coded using the <button> element instead.

Standard Level
WCAG 2 A 3.3.2 http://www.w3.org/WAI/WCAG20/quickref/#qr-minimize-error-cues
WCAG 2 A 4.1.2 http://www.w3.org/WAI/WCAG20/quickref/#qr-ensure-compat-rsv

Impact
Serious

Example Link
http://demo.moodle.net/

Test Steps

1. Tab to the Settings block
2. Tab to the My profile settings group
3. Hit enter button
4. The user is not identified that the My profile group has expanded and more links can be accessed.