feat: display status message on failed operations in Files app

scripts/copy_icons.sh

@@ -161,6 +161,7 @@ ICONS=(
     "categories/scalable/utilities-log-viewer.svg"
     "apps/scalable/sleep.svg"
     "apps/scalable/kolourpaint.svg" # paint app
+    "apps/scalable/dialog-error.svg" # Files error popup
     "panel/sensors-temperature-symbolic.svg" # temperature panel icon
     "actions/symbolic/view-paged-symbolic.svg" # page view toggle (word processor)
 )