Request frame when a window has been moved

Whenever a window's geometry changes, the scene has to be redrawn.
This has not been the case if the size didn't change.

Change-Id: Ic85e1d75221134788ab2cf2e76bf2ba121f3335e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit 11c19ac6e2892a552e5302fdf71aeb3e6a7812e9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/plugins/platforms/wasm/qwasmwindow.cpp

@@ -94,6 +94,8 @@ void QWasmWindow::setGeometry(const QRect &rect)
     QWindowSystemInterface::handleGeometryChange(window(), r);
     if (shouldInvalidate)
         invalidate();
+    else
+        m_compositor->requestUpdate();
 }
 
 void QWasmWindow::setVisible(bool visible)