Added support for reinit(), to reload the configuration files without

having to restart FlightGear.  This should speed up GUI design and
debugging quite a bit.

src/GUI/new_gui.cxx

@@ -42,6 +42,21 @@ NewGUI::init ()
 #endif
 }
 
+void
+NewGUI::reinit ()
+{
+    unbind();
+
+#if !defined(FG_OLD_MENUBAR)
+    delete _menubar;
+    _menubar = new FGMenuBar;
+#endif
+    _dialog_props.clear();
+
+    init();
+    bind();
+}
+
 void
 NewGUI::bind ()
 {

src/GUI/new_gui.hxx

@@ -54,6 +54,11 @@ public:
      */
     virtual void init ();
 
+    /**
+     * Reinitialize the GUI subsystem.
+     */
+    virtual void reinit ();
+
     /**
      * Bind properties for the GUI subsystem.
      *