Launcher: do not launch the simulator when closing the Qt launcher with ESC

src/GUI/QtLauncher.cxx

@@ -462,7 +462,7 @@ bool runLauncherDialog()
     // avoid double Apple menu and other weirdness if both Qt and OSG
     // try to initialise various Cocoa structures.
     flightgear::WindowBuilder::setPoseAsStandaloneApp(false);
-    
+
     QtLauncher dlg;
     dlg.show();
 
@@ -773,6 +773,11 @@ void QtLauncher::closeEvent(QCloseEvent *event)
     qApp->exit(-1);
 }
 
+void QtLauncher::reject()
+{
+    qApp->exit(-1);
+}
+
 void QtLauncher::onRun()
 {
     flightgear::Options* opt = flightgear::Options::sharedInstance();

src/GUI/QtLauncher_private.hxx

@@ -56,7 +56,7 @@ public:
     static void restartTheApp(QStringList fgArgs);
 protected:
     virtual void closeEvent(QCloseEvent *event);
-
+    virtual void reject();
 
 private slots:
     // run is used when the launcher is invoked before the main app is