Bug 16193: Typo in Automatic item modifications by age

Bug 16193: Typo in Automatic item modifications by age

To test:
1) Go to Tools -> Automatic item modifications by age
2) Click Edit
3) Add a rule if you have none, otherwise notice button 'Submit theses
   rules' and typo (theses)
4) Apply patch, refresh page
5) Confirm button now says 'Submit these rules' (typo is fixed)

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com