message: Change back to thumbs-up from heart.
diff: <span v-app-auth-required>
  <app-button
  class="-like-button"
  - icon="heart"
  + icon="thumbs-up"
  circle
  - primary
  + trans
  + :primary="hasLiked"
  :solid="hasLiked"
  :disabled="isProcessing"
  @click="like()"
  