Bug 15988: Moving authority types actions into a drop-down menu

 Bug 15988: Moving authority types actions into a drop-down menu

To test:

1) Go to Administration -> Authority types
2) Confirm all actions ('MARC Structure', Edit', 'Delete') have been moved into a drop down menu for each auth type, and each action behaves as expected.

Sponsored-by: Catalyst IT
Signed-off-by: Nicole C Engard <nengard@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>