Report server in error when saving wallet as part of rescan

src/mainwindow.cpp

@@ -244,13 +244,13 @@ MainWindow::MainWindow(QWidget *parent) :
         QJsonObject parsed = jd_reply.object();
 
         if (parsed.isEmpty() || parsed["result"].isNull()) {
-            QMessageBox::warning(this, tr("Failed to save wallet"), 
-                tr("Couldn't save the wallet") + "\n" + reply,
+            QMessageBox::warning(this, tr("Failed to save wallet"),
+                tr("Couldn't save the wallet") + "\n" + "server=" + config->server + "\n" + reply,
                 QMessageBox::Ok);
 
         } else {
             qDebug() << __func__ << ": saved wallet correctly";
-        }  
+        }
 
         dialog.close();
         // To rescan, we clear the wallet state, and then reload the connection