WelcomeScreen: fix components imports on Windows

The path-based loader in QML is broken there.

Change-Id: I390370ca098e288f6e241c526e068a70f17d676f
Reviewed-on: http://codereview.qt.nokia.com/947
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Christian Kamm <christian.d.kamm@nokia.com>

src/plugins/welcome/welcomeplugin.cpp

@@ -182,6 +182,7 @@ void WelcomeMode::initPlugins()
 
     QDeclarativeEngine *engine = m_welcomePage->engine();
     engine->setNetworkAccessManagerFactory(new NetworkAccessManagerFactory);
+    engine->addImportPath(Core::ICore::instance()->resourcePath() + "/welcomescreen");
     foreach (Utils::IWelcomePage *plugin, plugins) {
         plugin->facilitateQml(engine);
         m_pluginList.append(plugin);