Capture local holds as transits checkin modifier

Capture local holds as transits checkin modifier

Capture holds (not already on hold shelf) as transits instead.

Use cases may include:

New material being cataloged before it is "released". If captured normally
before release the shelf expire time would start ticking and notices would go
out.

Checking items in on a closed day. Can capture holds to avoid them being on a
pull list and set them aside to avoid "ready for pickup" notices and ticking
shelf expire clock.

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>