N°8701 - Fix class icon alt text displaying in portal tile when there's no icon defined

datamodels/2.x/itop-portal-base/portal/templates/bricks/manage/tile-default.html.twig

@@ -5,7 +5,7 @@
 {% block pTileTitle %}
     <div class="ipb-tile--title">
         <span>{{ oBrick.GetTitle()|dict_s }}</span><span><span>{{ iCount }}</span>
-            {% if sIconURL is defined %}
+            {% if sIconURL is defined and sIconURL is not empty %}
                 <img id="img{{ id }}" src="{{ sIconURL }}" class="ipb-tile--decoration--icon class-icon" alt="Class Icon">
             {% endif %}
         </span>