The DAGs main page has All/Active/Paused.

It would be nice if we can have also Running Now which will show all the DAGs that have at least 1 in Running of DAG runs:
![Screen Shot 2021-08-25 at 11 30 55](https://user-images.githubusercontent.com/62940116/130756490-647dc664-7528-4eb7-b4d8-515577f7e6bb.png)


For the above example the new DAGs tab of Running Now should show only 2 rows.
The use case is to see easily what DAGs are currently in progress.

task_id=task_id,
                map_indexes=map_indexes,
                origin=origin,
                upstream=upstream,
                downstream=downstream,
                future=future,
                past=past,
                state=TaskInstanceState.FAILED,
            )
        elif group_id:
            return self._mark_task_group_state(
                dag_id=dag_id,
                run_id=run_id,
                group_id=group_id,
                origin=origin,
                upstream=upstream,
                downstream=downstream,
                future=future,
                past=past,
                state=TaskInstanceState.FAILED,
            )
    @expose("/success", methods=["POST"])
    @auth.has_access(
        [
            (permissions.ACTION_CAN_EDIT, permissions.RESOURCE_DAG),
            (permissions.ACTION_CAN_EDIT, permissions.RESOURCE_TASK_INSTANCE),
        ]
    )
    @action_logging
    def success(self):