This patch should fix most of the problems for users trying to access
the user settings via screen reader. It makes sure user interface
elements can be reached via keyboard and provides proper labels, roles
and values so you not only can interact with elements but also know what
you are actually changing.
While not focused on other views, this should also already fix a number
of accessibility issues with other settings pages.
This commit adds a new settings conent component. This is a container
component for the settings pages, so that they all get the same
formatting by default. It handles the header text, description text, and
any "add new" plus button as needed.
