Set end date field as N.a. if the job is not completed.

app/templates/jobs/job.html.j2

@@ -31,6 +31,8 @@
         this.job = jobs[this.jobId];
       }
 
+      // End date
+      this.setEndDate(this.job.end_date);
       // Status
       this.setStatus(this.job.status);
       // End date
@@ -73,7 +75,13 @@
     }
 
     setEndDate(timestamp) {
-      document.getElementById("end-date").value = new Date(timestamp * 1000).toLocaleString();
+      var end_date;
+      if (timestamp === null) {
+        end_date = "N.a.";
+      } else {
+        end_date = new Date(timestamp * 1000).toLocaleString();
+      }
+      document.getElementById("end-date").value = end_date;
       M.updateTextFields();
     }