Bug 11097 - Hide duplicate patron button if logged in user lacks CAN_user_borrowers...

Bug 11097 - Hide duplicate patron button if logged in user lacks CAN_user_borrowers permission

The "duplicate" button on the circ/patron toolbar should not appear if
the logged in user lacks permission to edit patron records. This patch
wraps the button in the required logic.

To test, open a patron record in circulation or patrons and view as a
staff client user who both has and doesn't have CAN_user_borrowers
permission. The button should be shown and not shown accordingly.

Signed-off-by: Ed Veal <ed.veal@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>