Bug 37204: Add a booking has changed notice to update a patron should a booking be...

Bug 37204: Add a booking has changed notice to update a patron should a booking be updated

This is a first draft. When reading your initial statement again I'm asking myself whether
a changed itemnumber is relevant to the patron.
The way I see it, the relevant fields are:
- pickup_library_id
- start_date
- end_date

But maybe I'm not seeing it.

To test:
1) Apply the patch
2) Make an item bookable
3) Add a booking for a given patron
4) Check the patron notices tab, should not contain any notices
5) Change either start date, end date or pickup library and save
6) Check the patron notices tab, should contain a notice with the updated details
7) Run the tests under t/db_dependent/Koha/Booking.t
8) Sign off

Signed-off-by: LEBSimonsen <simonsen@bz-sh.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Sponsored-by: Büchereizentrale Schleswig-Holstein <https://www.bz-sh.de/>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>