Bug 18857 - Add buttons to left hand side of circ rules table

Bug 18857 - Add buttons to left hand side of circ rules table

To test:
* Apply this patch
* Define some rules in the interface using the left hand buttons
* Define some rules in the interface using the right hand buttons (scroll to see)
* Delete some rules in the interface using the left hand buttons
* Delete some rules in the interface using the right hand buttons (scroll to see)
* Choose a rule to edit using the left hand buttons
* Edit the rule, saving using the left hand button
* Edit a rule, but clear the values using the left hand buttons
* Choose a rule to edit using the right hand buttons (scroll to see)
* Edit the rule, saving using the right hand buttons (scroll to see)
* Edit a rule, but clear the values using the right hand buttons (scroll to see)

Signed-off-by: Guillaume <guillaume_lair@ville-limoges.fr>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>