root collection cannot be deleted

templates/index.html

@@ -26,8 +26,12 @@
                         <h1 class="text-center mb-3">Gestion des sources XML de MaX</h1>
                         <h3 class="mt-3 d-flex justify-content-between">
                           <span>Collection <em>{$collection}</em></span>
+                          {
+                            if($collection='/') then ()
+                            else
                             <sl-icon-button name="trash" title="supprimer la collection" label="supprimer la collection" onclick="deleteCurrentCollection()">
                             </sl-icon-button>
+                          }
                         </h3>
                     </header>
                     <section class="mt-3">