Section 508-compliance improvements

508-compliance improvements for keyboard navigation, text-to-speech readability, color contrast, image accessibility and form elements were made in the following areas:

Advanced searches
Alert Preview and Publish page
Alert Preview and Save page
Change Organization page
Change Password page
Custom attribute translation accessed from the Users menu
Feature Enablement settings page
Live Map
Log In page
My Profile page
New distribution list and edit a distribution list pages
Operator audit trail
Operator permissions profile page
Profile edit page
Sent Alerts page
Top navigation bar
User attribute manager accessed from the Users menu
User manager page