Fix activate item button in frontend display by retricting active item selection

Previously, other images where added while implementing streaming support. Now the
selector should be more specific to match the right image item in carusel.

Author: ohinckel

frontend/jinja2/frontend/dashboard.display.html

@@ -112,7 +112,7 @@
     return '{{ url('fe_dashboard_display') }}?action=display.set&item=' + item;
   }
   function setItem() {
-    const caruselItem = document.querySelector('.carousel-item.active img');
+    const caruselItem = document.querySelector('.carousel-item.active img[item]');
     window.location.href = activateItemUrl(caruselItem.getAttribute('item'));
   }
   const uploadedFiles = [];