**Apache Airflow version**: 2.1.0

**Browsers**: Chrome and Firefox

**What happened**:

Before upgrading to 2.1.0

![before](https://user-images.githubusercontent.com/14293802/120359517-c1ca1100-c2d5-11eb-95ba-58ccc0a3ac37.png)

After upgrading to 2.1.0

![after](https://user-images.githubusercontent.com/14293802/120359528-c4c50180-c2d5-11eb-8e04-f34846ea2736.png)

**What you expected to happen**:

Show/Edit/Delete under Security -> Users are available

<!-- What do you think went wrong? -->

**How to reproduce it**:

Go to Security -> Users (as an admin of course) 
airflow/www/views.py
'dag_id': wwwutils.dag_link,
    }
class TaskRescheduleModelView(AirflowModelView):
    """View to show records from Task Reschedule table"""
    route_base = '/taskreschedule'
    datamodel = AirflowModelView.CustomSQLAInterface(models.TaskReschedule)  
    related_views = [DagRunModelView]
    class_permission_name = permissions.RESOURCE_TASK_RESCHEDULE
    method_permission_name = {
        'list': 'read',
    }
    base_permissions = [
        permissions.ACTION_CAN_READ,
        permissions.ACTION_CAN_ACCESS_MENU,
    ]
    list_columns = [
        'id',
        'dag_id',
        'task_id',
        'execution_date',
        'try_number',
        'start_date',
        'end_date',
        'duration',
        'reschedule_date',
    ]
    search_columns = ['dag_id', 'task_id', 'execution_date', 'start_date', 'end_date', 'reschedule_date']
    base_order = ('id', 'desc')
    base_filters = [['dag_id', DagFilter, lambda: []]]
    def duration_f(self):