- added help in window About\nchanged About QMessageBox by a window

mainwindow.h

@@ -4,6 +4,7 @@
 #define QT_USE_FAST_OPERATOR_PLUS
 #include "ui_mainwindow.h"
 #include "ui_configuration.h"
+#include "ui_about.h"
 #include "downloadfile.h"
 #include "tools.h"
 #include <QMainWindow>
@@ -100,6 +101,8 @@ class MainWindow : public QMainWindow
         About about;
         QDialog Configuration;
         Ui::Configuration config;
+        QDialog aboutDialog;
+        Ui::windowAbout AboutW;
         std::vector <QString> serversList;
         QSystemTrayIcon * trayIcon;
         QList<QString> bwUnitText {