Adds the ngbDropdownItem directive to dropdown menu items in the staff
catalog bib record actions: Serials, Mark For, and Other Actions. This
adds support for navigating the menus using the up/down arrows on the
keyboard.
Signed-off-by: Stephanie Leary <stephanie.leary@equinoxOLI.org> Signed-off-by: Susan Morrison <smorrison@georgialibraries.org> Signed-off-by: Jane Sandberg <sandbergja@gmail.com>