feat(ui:items): uploading an item with a swimlane display

restore the legacy display with new element uploaded, when swimlane is in place
    as the sort is done by server side just add new element in a "new elements" swimlane.
    if user continue to scroll down in cursor/pages and item is found from server,
    UI remove it from the new element and restore the position

    other option: is user refresh it's page, server will restore the natural order

frontend/static/locales/es.json

@@ -387,7 +387,8 @@
     "col_added": "Añadido",
     "col_created_by": "Creado por",
     "col_opened": "Abierto",
-    "col_path": "Ubicación"
+    "col_path": "Ubicación",
+    "new_elements": "Nuevos elementos"
   },
   "dialogs": {
     "rename_folder": "Renombrar carpeta",