WelcomePage: Show demos in the examples view

Change-Id: Idc466b7e058375c0e393eb9f9dd2cc8f58abb2af
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -717,7 +717,7 @@ bool ExamplesListModelFilter::filterAcceptsRow(int sourceRow, const QModelIndex
 
     if (!m_showTutorialsOnly) {
         int type = sourceModel()->index(sourceRow, 0, sourceParent).data(Type).toInt();
-        if (type != Example)
+        if (type != Example && type != Demo)
             return false;
     }