title: Angular i18n ICU select supporting untranslated values
body: <p>I use ICU select to translate bind data in html template. How can I force angular to display data not being translated? </p>
  
  <p>HTML template including ICU select: </p>
  
  <pre><code>&lt;mat-option *ngFor="let mode of deviceModes" [value]="mode.id" i18n&gt;
      {mode.name, select, mode {mode}}
  &lt;/mat-option&gt;
  </code></pre>
  
  <p>XLIFF file: </p>
  
  <pre><code>&lt;source&gt;{VAR_SELECT, select, mode {mode} }&lt;/source&gt;
  &lt;target state="final"&gt;{VAR_SELECT, select, press_me {Press Me} guard_me {Guard Me} disarmed {Disarmed} active {Active} suspended {Suspended} broken_or_stolen {Broken or stolen} }&lt;/target&gt;
  </code></pre>
  
  <p>It works fine but if mode.name contains a new value that is not translated in XLIFF file, it is currently not displayed in html. I need to show it. </p>