feat: admin search UI (#4022)

extensions/sticky/js/src/admin/extend.ts

@@ -1 +0,0 @@
-export { default as default } from '../common/extend';

extensions/sticky/js/src/admin/extend.tsx

@@ -1,15 +1,17 @@
+import Extend from 'flarum/common/extenders';
 import app from 'flarum/admin/app';
+import commonExtend from '../common/extend';
 
-export { default as extend } from './extend';
+export default [
+  ...commonExtend,
 
-app.initializers.add('flarum-sticky', () => {
-  app.extensionData.for('flarum-sticky').registerPermission(
-    {
+  new Extend.Admin().permission(
+    () => ({
       icon: 'fas fa-thumbtack',
       label: app.translator.trans('flarum-sticky.admin.permissions.sticky_discussions_label'),
       permission: 'discussion.sticky',
-    },
+    }),
     'moderate',
     95
-  );
-});
+  ),
+];

extensions/sticky/js/src/admin/index.tsx

@@ -0,0 +1,7 @@
+import app from 'flarum/admin/app';
+
+export { default as extend } from './extend';
+
+app.initializers.add('flarum-sticky', () => {
+  // ...
+});