Steps to reproduce (assumes ChromeVox or similar)

1. Open https://elastic.github.io/eui/#/layout/modal in a new tab.
2. Tab to the "Show dangerous ConfirmModal" button
3. Press enter

Actual Result

Only the "Yes, Do It" button is focused and read

Expected Result

The screen reader should read the button text, but also indicate that this action could be dangerous, or permanent,or otherwise.

Suggested Fix
Try the example here: http://gdkraus.github.io/accessible-modal-dialog/ with ChromeVox

Category: #688: Elastic UI Buttons Accessibility,
Relevant WCAG Criteria: 3.3.2 Input Assistance: Labels or Instructions