Replace Ember app with Mithril app

js/forum/src/components/post-header-toggle.js

@@ -0,0 +1,13 @@
+import Component from 'flarum/component';
+import icon from 'flarum/helpers/icon';
+
+/**
+  Component for the toggle button in a post header. Toggles the
+  `parent.revealContent` property when clicked. Only displays if the supplied
+  post is not hidden.
+ */
+export default class PostHeaderToggle extends Component {
+  view() {
+    return m('a.btn.btn-default.btn-more[href=javascript:;]', {onclick: this.props.toggle}, icon('ellipsis-h'));
+  }
+}