Replace Ember app with Mithril app

js/lib/components/field-set.js

@@ -0,0 +1,11 @@
+import Component from 'flarum/component';
+import listItems from 'flarum/helpers/list-items';
+
+export default class FieldSet extends Component {
+  view() {
+    return m('fieldset', {className: this.props.className}, [
+      m('legend', this.props.label),
+      m('ul', listItems(this.props.fields))
+    ]);
+  }
+}