LP2045078: remove unneeded i18n and label semantics from spacing element

LP2045078: remove unneeded i18n and label semantics from spacing element

This <label> element doesn't label anything, nor does it contain any meaningful
content for translation.  Since it is just used for spacing (so that the
Show Batch Actions button is in line with the actions themselves), let's just
use an untranslateable span instead.

Signed-off-by: Jane Sandberg <js7389@princeton.edu>
Signed-off-by: Stephanie Leary <stephanie.leary@equinoxoli.org>
Signed-off-by: Terran McCanna <tmccanna@georgialibraries.org>