LP#1325704: Update Items-Out YAOUS descrip for web client

LP#1325704: Update Items-Out YAOUS descrip for web client

Three settings refer to the "top" and "bottom" lists on the XUL client
Items Out screen. With the web client, these have become three named
tabs. This commit updates the setting descriptions in the seed data so
they reflect the new design. I also attempted to make the meaning of the
values more clear by labeling the two subsettings as "A" and "B".

Signed-off-by: Remington Steed <rjs7@calvin.edu>
Signed-off-by: Terran McCanna <tmccanna@georgialibraries.org>