Dual listbox (in Admin) is not easily accessible to screen readers

[Jono M]

*** Superseded and fixed in Bug #1489245

In pages such as /admin/users/staff.php and /admin/users/admins.php, staff or administrators are chosen by selecting items in one list then clicking a button to transfer them to another list. However, the buttons do not have a descriptive value so it's hard for screen reader users to figure out how this works.
The "<" and ">" buttons should be given values which describe what they do (eg. "Move to administrators") and a note should be added in the user manual which explains how to select and move items using the keyboard (including selecting multiple items, etc.)

Affects latest master (using Orca 3.10.1)

[Kristina Hoeppner (kris-hoeppner)]

There is a note about doubling clicking a name for moving it at http://manual.mahara.org/en/1.8/administration/institutions.html#members but I haven't added it everywhere yet. Can do so for the 1.9 manual.