Qt GUI: made the Qt4 main window native Qt4 (no more use of Q3MainWindow)

src/qtgui/confgui/confguiindex.h

@@ -10,9 +10,11 @@
 #include <qwidget.h>
 #include <qstring.h>
 #if QT_VERSION < 0x040000
+#include <qgroupbox.h>
 #include <qtabdialog.h>
 #define QTABDIALOG QTabDialog
 #else // Qt4 -> 
+#include <Q3GroupBox>
 #include <Q3TabDialog>
 #define QTABDIALOG Q3TabDialog
 #endif // QT 3/4
@@ -26,7 +28,6 @@ class ConfNull;
 class RclConfig;
 class ConfParamW;
 class ConfParamDNLW;
-class QGroupBox;
 
 namespace confgui {
 
@@ -54,12 +55,6 @@ public:
     ConfTopPanelW(QWidget *parent, ConfNull *config);
 };
 
-#if QT_VERSION < 0x040000
-#include <qgroupbox.h>
-#else
-#include <Q3GroupBox>
-#endif
-
 /**
  * A panel for the parameters that can be changed in subdirectories:
  */