Bug 1030346 - removed redundant role="menuitem" from header buttons. Button is more consistent with the rest of the UI when in screen reader mode.
Bug 1030346 - make element order in markup consistent with the displayed order.
Bug 1030346 - fixed list, listbox and false list roles.
Bug 1030346 - fixed listbox dropdown roles and aria markup.
Bug 1030346 - fixed checkbox roles, state and aria markup.
Bug 1030346 - updated labels, aria labels and their aria-visibility.
Merge pull request #23348 from yzen/bug-1030346

Bug 1030346 - several improvements to Contacts accessibility.