firmware: always schedule next poll

This avoids akward scenarios when the webserver is reloading,
spitting out temporary messages.  In that case, simply keep
polling until the request is back.  The backend keeps running
anyway.

src/opnsense/mvc/app/views/OPNsense/Core/firmware.volt

@@ -140,10 +140,7 @@ POSSIBILITY OF SUCH DAMAGE.
                 $('#update_status').html(data['log']);
                 $('#update_status').scrollTop($('#update_status')[0].scrollHeight);
             }
-            if (data['status'] == 'running' || data['status'] == 'error') {
-                // schedule next poll
-                setTimeout(trackStatus, 500);
-            } else if (data['status'] == 'done') {
+            if (data['status'] == 'done') {
                 $('#updatestatus').html("{{ lang._('Upgrade done!') }}");
             } else if (data['status'] == 'reboot') {
                 // reboot required, tell the user to wait until this is finished and redirect after 5 minutes
@@ -169,7 +166,9 @@ POSSIBILITY OF SUCH DAMAGE.
                         }
                     }]
                 });
-
+            } else {
+                // schedule next poll
+                setTimeout(trackStatus, 500);
             }
         });
     }