QmlDesigner.FormEditor: Fix root item visibility

Task-number: QTCREATORBUG-5504

Change-Id: I8ecf06c221d9e69bf25785940b390d744386f6a5
Reviewed-on: http://codereview.qt.nokia.com/1896

Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

src/plugins/qmldesigner/components/formeditor/formeditorscene.cpp

@@ -199,12 +199,8 @@ void FormEditorScene::synchronizeOtherProperty(const QmlItemNode &qmlItemNode, c
         if (propertyName == "z")
             item->setZValue(qmlItemNode.instanceValue("z").toDouble());
 
-        if (!qmlItemNode.isRootNode()) {
-            if (propertyName == "visible")
-                item->setContentVisible(qmlItemNode.instanceValue("visible").toBool());
-        } else {
-            item->setContentVisible(true);
-        }
+        if (propertyName == "visible")
+            item->setContentVisible(qmlItemNode.instanceValue("visible").toBool());
     }
 }