lp1908439 Auto-override enhancment

lp1908439 Auto-override enhancment

This reworks the override action dialogs in the patron display for Check
Out and Items Out, and in the Circulation -> Renew Items interface.  It
exposes the auto-override behavior as checkboxes giving staff more fine
grained control over which events are auto-forced or skipped upon
subsequent encounters.  It also changes the Cancel action for batch
renewals to abort the remaining renewals in the batch, and makes it so
that new authorization credentials provided during such a batch will be
treated as an operator change for the entire batch.  We also fix an
existing bug where events marked as already encountered for
auto-override could leak into other patron contexts via Patron Search.

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