Welcome: Scroll view on filter update

Task-number: QTCREATORBUG-18261
Change-Id: Ib7060af4cc787e4da55a860d0ae528e535fdcda7
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -709,6 +709,7 @@ void ExamplesListModelFilter::timerEvent(QTimerEvent *timerEvent)
 {
     if (m_timerId == timerEvent->timerId()) {
         invalidateFilter();
+        emit layoutChanged();
         killTimer(m_timerId);
         m_timerId = 0;
     }