title: How to display default text when translation is missing using jhiTranslate
body: <p>in JHipster application I want to display a default text within a html element when a translation is missing.</p>
  <p>I use angular ngFor directive to display elements in an array, some of which have a translation and some of which are inserted by a user, and therefore have no translation in i18n json. I couldn't find any documentation that explained how to use jhiTranslate</p>
  <p>I was thinking about syntax like this</p>
  <pre><code>&lt;div jhiTranslate=&quot;example.1&quot;&gt;Default Text&lt;/div&gt;
  </code></pre>
  <p>and if this particular translation was missing a &quot;Default Text&quot; would be shown. for now it shows &quot;translation-not-found[example.1]&quot;.</p>
  <p>Is there a way to achieve this using jhiTranslate?</p>