Ensure Monitoring tab is highlighted

app/views/layouts/nav/_admin.html.haml

@@ -9,7 +9,7 @@
       = link_to admin_root_path, title: 'Overview', class: 'shortcuts-tree' do
         %span
           Overview
-    = nav_link(controller: %w(background_jobs logs health_check)) do
+    = nav_link(controller: %w(system_info background_jobs logs health_check)) do
       = link_to admin_background_jobs_path, title: 'Monitoring' do
         %span
           Monitoring