Bug 7413: Add "No renewal before" to the circulation and fine rules

Bug 7413: Add "No renewal before" to the circulation and fine rules

This patch adds a column "No renewal before" to the circulation and
fine rules table.

To test:
1) Add or edit some issuing rules.
2) Confirm that an empty entry, zero and non-numerical values for
   "No renewal before" are saved as undefined.
3) Confirm that numerical values can be entered and saved.

Sponsored-by: Hochschule für Gesundheit (hsg), Germany
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>