slides: grantable slides.manage permission for non-admin curators

shopdb/core/api/auth.py

@@ -152,6 +152,7 @@ def login():
             'firstname': user.firstname,
             'lastname': user.lastname,
             'roles': [r.rolename for r in user.roles],
+            'permissions': user.getpermissions(),
             'mustchangepassword': bool(user.mustchangepassword)
         }
     })