message: minifix: use svg contents list in main template
  We use a list instead of element with `svg-icon` in `main.tpl.html`, as
  required by the `svg-icon` component and will return an error
  otherwise.
  Fixes:
  Change-Type: patch
  Changelog-Entry: Use SVG contents list in main template.
diff: <div class="box text-center relative" os-dropzone="image.selectImageByPath($file)">
  <div class="center-block">
  - <svg-icon contents="main.selection.getImageLogo()" paths="[ '../../assets/image.svg' ]"></svg-icon>
  + <svg-icon contents="[ main.selection.getImageLogo() ]" paths="[ '../../assets/image.svg' ]"></svg-icon>
  </div>
  <div class="space-vertical-large">
  