Major changes on code

Remove Qt4 support
Change include headers
Change the include of QCustomPlot lib and updated code based on upstream

app/ModuleHandleDock.h

@@ -27,12 +27,10 @@
 
 #include "PlaYUVerAppDefs.h"
 #include "config.h"
-#if( QT_VERSION_PLAYUVER == 5 )
-#include <QtWidgets>
-#elif( QT_VERSION_PLAYUVER == 4 )
 #include <QWidget>
-#include <QtGui>
-#endif
+#include <QSize>
+
+class QLabel;
 
 class PlaYUVerAppModuleIf;