message: App: Use JwtPipe in responsive-image.component.html
  This also fixes a probably/perhaps unknown error:
  The 2x variant (when breakpoint.pathToRetinaImage is true)
  did not have 'api/' prepended, i.e. the URL was invalid.
diff: <picture class="responsive-image">
  <source *ngFor="let breakpoint of this.responsiveImageData.breakpoints" media="(min-width: {{breakpoint.screenSize}}px)"
  - srcset="api/{{breakpoint.pathToImage}}{{breakpoint.pathToRetinaImage ? ' 1x, ' + breakpoint.pathToRetinaImage + ' 2x' : ''}}">
  + srcset="api/{{breakpoint.pathToImage | jwt}}{{breakpoint.pathToRetinaImage ? ' 1x, api/' + (breakpoint.pathToRetinaImage | jwt) + ' 2x' : ''}}">
  <img class="{{this.classes}}" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" />
  </picture>
  -
  