Fixing the datepicker on the graph view

airflow/www/templates/airflow/graph.html

@@ -10,6 +10,7 @@
     href="{{ url_for('static', filename='dagre.css') }}">
 <link rel="stylesheet" type="text/css"
     href="{{ url_for('static', filename='graph.css') }}">
+<link href="{{ admin_static.url(filename='vendor/bootstrap-daterangepicker/daterangepicker-bs2.css') }}" rel="stylesheet">
 {% endblock %}
 
 {% block body %}