title: How set a page title into Openui5
body: <p>I want to set the title of a page. I use this <code>js</code> code:</p>
  
  <pre><code>sap.ui.core.Core().byId("operationDetail").getController().changePageTitle("HELLO");
                  console.log(sap.ui.core.Core().byId("operationDetail").byId("pageOperation").getProperty("title"));
  </code></pre>
  
  <p>The 2nd command returns "HELLO" correctly, but the page does not show the new title. How can I refresh the page?</p>