Bug 11040: Add CircAutoPrintQuickSlip option to print regular slip

Bug 11040: Add CircAutoPrintQuickSlip option to print regular slip

This patch adds a third option to the CircAutoPrintQuickSlip system
preference.  The three options are now:

* print quick slip
* print regular slip
* clear the screen

Test plan:
1.  Set the System Preference for CircAutoPrintQuickSlip to "clear the
    screen".
    Enter a borrower barcode for checkout
    Press Enter
    The screen should be cleared.

2.  Set the System Preference for CircCircAutoPrintQuickSlip to "open a
    quick slip window"
    Enter a borrower barcode for checkout
    Press Enter
    A Quick slip is printed.

3.  Apply the patch
    Update the database using UpdateDatabase.pl

4.  Set the System Preference for CircAutoPrintQuickSlip to "clear the
    screen".
    Enter a borrower barcode for checkout
    Press Enter
    The screen should be cleared.

5.  Set the System Preference for CircCircAutoPrintQuickSlip to "open a
    quick slip window"
    Enter a borrower barcode for checkout
    Press Enter
    A Quick slip is printed.

6.  Set the System Preference for CircCircAutoPrintQuickSlip to "open a
    slip window"
    Enter a borrower barcode for checkout
    Press Enter
    A Slip is printed.

7.  Reload the database using sysprefs.sql
    Set the System Preference for CircAutoPrintQuickSlip to "clear the
    screen".
    Enter a borrower barcode for checkout
    Press Enter
    The screen should be cleared.

8.  Set the System Preference for CircCircAutoPrintQuickSlip to "open a
    quick slip window"
    Enter a borrower barcode for checkout
    Press Enter
    A Quick slip is printed.

9.  Set the System Preference for CircCircAutoPrintQuickSlip to "open a
    slip window"
    Enter a borrower barcode for checkout
    Press Enter
    A Slip is printed.

10.  Verify that the Checkout Help includes information about printing Slips.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>