Switch window type from "normal" to "always on top" and from "always on top" to "normal".

#include <windows.h>
void MainWindow::alwaysOnTopSwitch(bool aChecked)
{
#ifdef Q_OS_WIN
//#include <windows.h>
   if(aChecked)
       SetWindowPos(winId(), HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
   else
       SetWindowPos(winId(), HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
#else
    if(aChecked)
    {
        setWindowFlags(windowFlags() | Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint);
        show();
    }
    else
    {
        this->setWindowFlags(windowFlags() ^ (Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint));
        show();
    }
#endif