FEATURE: style menu

This commit adds some markup to sidebars in admin.

app/MenuPresenters/FoundationInitializedDropdownMenuPresenter.php

@@ -0,0 +1,10 @@
+<?php
+namespace App\MenuPresenters;
+
+class FoundationInitializedDropdownMenuPresenter extends FoundationDropdownMenuPresenter
+{
+    public function getOpenTagWrapper()
+    {
+        return PHP_EOL . '<ul class="menu">' . PHP_EOL;
+    }
+}