Move forum ember app into a subdir, preparing for admin app to exist alongside

ember/forum/app/components/ui/dropdown-button.js

@@ -0,0 +1,31 @@
+import Ember from 'ember';
+
+/**
+  Button which has an attached dropdown menu containing an item list.
+ */
+export default Ember.Component.extend({
+  layoutName: 'components/ui/dropdown-button',
+  classNames: ['dropdown', 'btn-group'],
+  classNameBindings: ['itemCountClass', 'class'],
+
+  label: 'Controls',
+  icon: 'ellipsis-v',
+  buttonClass: 'btn btn-default',
+  menuClass: '',
+  items: null,
+
+  dropdownMenuClass: Ember.computed('menuClass', function() {
+    return 'dropdown-menu '+this.get('menuClass');
+  }),
+
+  itemCountClass: Ember.computed('items.length', function() {
+    var count = this.get('items.length');
+    return count ? 'item-count-'+this.get('items.length') : '';
+  }),
+
+  actions: {
+    buttonClick: function() {
+      this.sendAction('buttonClick');
+    }
+  }
+});