Bug 15691: Show card number minimum and maximum in visible hint when adding a patron

Bug 15691: Show card number minimum and maximum in visible hint when adding a patron

The CardnumberLength system preference defines card number minimum and
maximum allowed values when adding a patron. This information is
currently hidden in a title attribute on the card number input field.

This patch moves the information into a <div class="hint">, matching
other fields in the entry form which offer details about entry
guidelines.

To test, apply the patch and open the new patron entry form. Test for
various values of CardnumberLength, and with 'cardnumber' mandatory or
not mandatory as defined in BorrowerMandatoryField.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com