Show the kiosk label prefix, and let a plugin declare the settings it owns

plugins/notifications/frontend/views/NotificationForm.vue

@@ -275,7 +275,12 @@ const form = ref({
   starttime: '',
   endtime: '',
   isactive: true,
-  isshopfloor: false,
+  // Ticked for a NEW notification: the shopfloor board is where these are
+  // meant to be seen, and leaving it off by default meant most were written
+  // and then never appeared there. Editing an EXISTING notification still
+  // loads its own stored value (see loadNotification), so this never flips a
+  // setting somebody deliberately turned off.
+  isshopfloor: true,
   employeesso: ''
 })