Bug 12550 - Add ability to delay loading of patron's checkouts in circulation and...

Bug 12550 - Add ability to delay loading of patron's checkouts in circulation and patron details

Now that a patron's checkouts are loaded asynchronously, we can further
improve Koha's performance by not loading the checkouts table when it is
not needed. For example, if a librarian is checking out 5 items to a
patron, we really don't need to load the table during the scanning of
items 1 to 4, just for item 5. Another example would be browsing to the
patron details table in order to change a patron's password.

Test Plan:
1) Apply this patch
2) Browse to circulation.pl for a patron
3) Note the table is not loaded automatically
4) Click the "Show checkouts" button
5) Note the checkouts table loads
6) Check the "Always show checkouts immediately" checkbox
7) Reload the page, the checkouts should now load immediately
8) Repeat steps 3-7 for the patron details page ( moremember.pl )

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Amended patch: remove trailing spaces.
Note: I am not sure the checkbox is at the best place, but I don't have
a better suggestion.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>