message: fix: drag preview tile styles
diff: [customAltText]="'Activity icon'"
  class="content__activity-icon"
  ></flogo-activity-icon>
  + <div class="content__text-group">
  <div class="content__text content__text--title">
  {{ title }}
  </div>
  </div>
  </div>
  </div>
  +</div>
  