title: Data-binded Text is not shown in my UI5-Application
body: <p>I want to bind text from my JSON-Model to the text of a button.</p>
  
  <p>My controller initializes my model:</p>
  
  <pre><code>onInit: function () {
  
              var oModel = new JSONModel({
                  "test": "Hello"
              });
  
              this.getView().setModel(oModel, "jsonFile");
  
          }
  </code></pre>
  
  <p>My View looks like this:</p>
  
  <pre><code>&lt;mvc:View xmlns="sap.m" xmlns:mvc="sap.ui.core.mvc" controllerName="sap.ui.demo.nav.controller.Home"&gt;
     &lt;Page id="_IDEGen_page0" title="{i18n&gt;homePageTitle}" class="sapUiResponsiveContentPadding"&gt;
        &lt;content&gt;
           &lt;Button id="_IDEGen_button0" text="Start new Game" press="onPressStartGame"/&gt;
           &lt;Button text="{jsonFile&gt;test}"/&gt;
        &lt;/content&gt;
     &lt;/Page&gt;
  &lt;/mvc:View&gt;
  </code></pre>
  
  <p>But when I run my application, the ui5-inspector show my that the binding is active, but the text is not shown.
  <a href="https://i.stack.imgur.com/hXWzP.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hXWzP.jpg" alt="Running Application with model binding"></a></p>
  
  <p>I have no idea, what the problem could be in this case. Who can help me? What could be the problem, that the text is not shown?</p>