Bug 11209: (follow-up) check if a notice has been already sent today

Bug 11209: (follow-up) check if a notice has been already sent today

The previous patch checks if a notice has already been sent when the
current notices has been sent in queue. Which is wrong!
We have to check if a similar notice has been sent today.

This patch has been created after an observation on a production server:
If a user place on holds several items, he will receive 1 SMS per hold.
Here we only want 1 SMS for all holds.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>