Fixed hidden demo shortcut

* Command line option needs fixing, too (enable shortcut!)
* Demo mode itself still needs improvements

src/pulsatingscience.cpp

@@ -70,7 +70,7 @@ PulsatingScience::PulsatingScience(QWidget *parent) : QMainWindow(parent)
     m_fullscreenESCShortcut->setEnabled(false);
 
     // register "hidden" demo mode shortcut for IYA2009 exhibition
-    m_hiddenShortcut = new QShortcut(Qt::CTRL + Qt::SHIFT + Qt::ALT + Qt::Key_D, this);
+    m_hiddenShortcut = new QShortcut(QKeySequence(Qt::SHIFT + Qt::ALT + Qt::Key_D), this);
 
     // establish object communications
     connect(ui.pushRun, SIGNAL(clicked()),