Improved error reporting

pglab/DatabaseWindow.cpp

@@ -118,6 +118,14 @@ void DatabaseWindow::setConfig(const ConnectionConfig &config)
                 if (qthis)
                     qthis.data()->catalogLoaded(db);
             }
+        ).onFailed(qApp, [qthis](OpenDatabaseException &ex)
+            {
+                if (qthis) {
+                    QMessageBox::critical(qthis.data(), "Error reading database",
+                                          ex.text());
+                    qthis.data()->close();
+                }
+            }
         );
 
     }