List grants no plugin declares with a Remove, and save a permission change as one Keto transaction

examples/plugins/auth-admin/i18n/en-US.ts

@@ -53,12 +53,14 @@ const messages = {
   "admin.grants.inherited": "Greyed-out permissions come from a group. Change them on that group.",
   "admin.grants.legend": "Permissions",
   "admin.grants.none": "No installed plugin declares a permission, so there is nothing to grant.",
-  "admin.grants.partial": "Saving stopped part-way because the permission service failed, so only some changes were applied. Check the permissions and make any remaining changes again.",
   "admin.grants.pending": "Members get this at their next sign-in (up to 10 minutes).",
+  "admin.grants.remove": "Remove",
   "admin.grants.save": "Save permissions",
   "admin.grants.saved": "Permissions saved.",
   "admin.grants.selfRevoke": "You can't revoke your own permissions — ask another administrator, so you can't lock yourself out.",
   "admin.grants.stale": "These permissions changed while you had the page open, so nothing was saved. The list now shows the current state. Review it and save again.",
+  "admin.grants.undeclaredHint": "Held here, but no installed plugin declares them, so the list above can't change them. Installing a plugin that gates on one would activate it again. Remove any you don't recognise.",
+  "admin.grants.undeclaredLegend": "Permissions no installed plugin declares",
 
   "admin.groups.actions": "Group actions",
   "admin.groups.addMember": "Add a member",