add of web button to index.html

mainwindow.h

@@ -53,6 +53,7 @@ public:
     void newPath();
     void extractDialogue();
     bool m_handlingUndoRedo = false;
+    void openIndexSite();
 
 private slots:
     void on_pushButton_clicked();
@@ -127,6 +128,8 @@ private slots:
 
     void on_actionExit_triggered();
 
+    void on_actionWeb_triggered();
+
 private:
     Ui::MainWindow *ui;
     QString currentFile;