message: Slightly smaller comments heading
diff: <template>
  <div class="comment-widget">
  <div v-if="displayMode">
  - <h2 v-if="displayMode" class="sans-margin-top">
  + <h4 v-if="displayMode" class="sans-margin-top">
  <translate
  v-if="displayMode === 'comments'"
  :translate-n="totalCommentsCount"
  >
  1 shout
  </translate>
  - </h2>
  + </h4>
  </div>
  <app-loading v-if="!hasBootstrapped && !hasError" centered />
  