Dashlet: allow to hide regardless of permissions

application/views/scripts/dashboard/index.phtml

@@ -21,6 +21,7 @@ if ($description !== null): ?>
 <?php endif ?>
 <ul class="main-actions" data-base-target="_next">
 <?php foreach ($dashboard->dashlets() as $dashlet): ?>
+<?php if (! $dashlet->shouldBeShown()) { continue; } ?>
 <li>
 <?= $dashlet->render() ?>
 </li>

library/Director/Dashboard/Dashlet/Dashlet.php

@@ -151,6 +151,11 @@ abstract class Dashlet
         return true;
     }
 
+    public function shouldBeShown()
+    {
+        return true;
+    }
+
     public function getSummary()
     {
         $result = '';