I used this trick,
In the title field you can enter an img tag or an icon
es.
<img src=”your-image”.. or <i class=”fa fa-envelope-o” aria-hidden=”true” fontawesome
After some adjustments of css and js, worked for me.
This reply was modified 7 years, 3 months ago by giam87.
Really appreciate for sharing this here as it might help out others looking to do some like stuff. Will try to add this feature in our near future releases.