lp1811710: minor tweaks to the eg2 holds grid

lp1811710: minor tweaks to the eg2 holds grid

column label fixes and let some actions work with multiple rows

fix for item barcode link

prevent certain actions from spawning broken interfaces

disable Title Hold Transfer if non-title holds are selected

render hold status

return the sms carrier name instead of the id in the wide_holds API
(we may want to back this one out and do it differently)

show time component for timestamp columns

fixed live summaries for various hold actions intended for large batches

remove mvr.* from eg2 holds grid; not doing anything

Signed-off-by: Jason Etheridge <jason@EquinoxInitiative.org>