Bug 22553: Unchecking a subpermission does not uncheck the top level permission

Bug 22553: Unchecking a subpermission does not uncheck the top level permission

This patch makes a minor change to the set permissions page's JavaScript
so that unchecking a subpermission will uncheck the top level
permission.

To test, apply the patch and open the "Set permissions" page for a
patron.

 - Expand a permission with multiple subpermissions.
 - Check the top level permission. All subpermissions should be checked.
 - Uncheck one of the subpermissions. The top level permission should
   now be unchecked.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>