Fix closing modal dialogs on database lock

* Fixes #5719, Fixes #5744

src/gui/MainWindow.cpp

@@ -1536,11 +1536,6 @@ void MainWindow::toggleWindow()
 
 void MainWindow::lockDatabasesAfterInactivity()
 {
-    // ignore event if a modal dialog is open (such as a message box or file dialog)
-    if (QApplication::activeModalWidget()) {
-        return;
-    }
-
     m_ui->tabWidget->lockDatabases();
 }