Update notification modifier for new structure

ui/packages/consul-ui/app/modifiers/notification.js

@@ -5,20 +5,28 @@
 
 import Modifier from 'ember-modifier';
 import { inject as service } from '@ember/service';
+import { registerDestructor } from '@ember/destroyable';
 
+function cleanup(instance) {
+  if (instance && instance?.named?.sticky) {
+    instance.notify?.clearMessages();
+  }
+}
 export default class NotificationModifier extends Modifier {
   @service('flashMessages') notify;
 
-  didInstall() {
-    this.element.setAttribute('role', 'alert');
-    this.element.dataset['notification'] = null;
+  modify(element, _, named) {
+    this.named = named;
+    element.setAttribute('role', 'alert');
+    element.dataset['notification'] = null;
+
     const options = {
       timeout: 6000,
       extendedTimeout: 300,
-      ...this.args.named,
+      ...named,
     };
-    options.dom = this.element.outerHTML;
-    this.element.remove();
+    options.dom = element.outerHTML;
+    element.remove();
     this.notify.clearMessages();
     if (typeof options.after === 'function') {
       Promise.resolve()
@@ -28,16 +36,13 @@ export default class NotificationModifier extends Modifier {
             throw e;
           }
         })
-        .then((res) => {
+        .then((_) => {
           this.notify.add(options);
         });
     } else {
       this.notify.add(options);
     }
-  }
-  willDestroy() {
-    if (this.args.named.sticky) {
-      this.notify.clearMessages();
-    }
+
+    registerDestructor(this, cleanup);
   }
 }