mainwindow: only minimize on close if not onboarding

Change-Id: Id807371f3687bb4ae028c5cc1931f11d13d0ac6b

mainwindow.cpp

@@ -290,7 +290,8 @@ void MainWindow::closeEvent(QCloseEvent* event)
 {
     LRCInstance::avModel().stopPreview();
     QSettings settings("jami.net", "Jami");
-    if (settings.value(SettingsKey::closeOrMinimized).toBool()) {
+    if (LRCInstance::accountModel().getAccountList().size() &&
+        settings.value(SettingsKey::closeOrMinimized).toBool()) {
         this->hide();
         event->ignore();
     } else {