[AIRFLOW-3668] 'Zoom into sub DAG' button fix

[Jaskon]

'Zoom into sub DAG' button had not shown on the graph.html page in subdag details dialog window

[ron819]

Can you also apply the fix to https://github.com/apache/airflow/blob/master/airflow/www_rbac/templates/airflow/graph.html#L161
?

[Jaskon]

Of course

[codecov-io]

Codecov Report

Merging #4473 into master will decrease coverage by 62.85%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #4473       +/-   ##
===========================================
- Coverage   79.47%   16.61%   -62.86%     
===========================================
  Files         204      204               
  Lines       16534    16534               
===========================================
- Hits        13140     2747    -10393     
- Misses       3394    13787    +10393

Impacted Files	Coverage Δ
airflow/www_rbac/validators.py	0% <0%> (-100%)	⬇️
airflow/utils/log/es_task_handler.py	0% <0%> (-100%)	⬇️
airflow/example_dags/subdags/subdag.py	0% <0%> (-100%)	⬇️
airflow/operators/hive_stats_operator.py	0% <0%> (-100%)	⬇️
airflow/www/validators.py	0% <0%> (-100%)	⬇️
airflow/example_dags/example_docker_operator.py	0% <0%> (-100%)	⬇️
airflow/example_dags/example_subdag_operator.py	0% <0%> (-100%)	⬇️
airflow/api/common/experimental/get_dag_runs.py	0% <0%> (-100%)	⬇️
airflow/www/forms.py	0% <0%> (-100%)	⬇️
airflow/operators/postgres_operator.py	0% <0%> (-100%)	⬇️
... and 167 more

---

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[codecov-io]

Codecov Report

Merging #4473 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4473   +/-   ##
=======================================
  Coverage   79.47%   79.47%           
=======================================
  Files         204      204           
  Lines       16534    16534           
=======================================
  Hits        13140    13140           
  Misses       3394     3394

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 24bc74b...f9f0ba3. Read the comment docs.

[OmerJog]

@Jaskon can you rebase?
Due to merge of #4339 the airflow/www was deprecated and the airflow/www_rbac was renamed as airflow/www

[ashb]

We probably want this fix as it is against v1-10-stable branch to fix this for 1.10.4.

[ashb]

Not needed anymore. 1.10.4 the code looks like:

        if (d in task_instances)
            try_number = task_instances[d].try_number;
        else
            try_number = 0;
        if (task.task_type == "SubDagOperator")
            call_modal(d, execution_date, try_number, true);
        else
            call_modal(d, execution_date, try_number);