User permission update reactivity fix

ref #48

src/components/users/UserPermissions.svelte

@@ -50,6 +50,7 @@
           (o) => o.target + ":" + o.action !== a.target + ":" + a.action
         );
       });
+      grantedPermissions_initial = grantedPermissions;
       Toastify({
         text: $_("permissions-updated"),
         duration: 2500,