Move dashboard logos to their own folder

index.php

@@ -45,7 +45,7 @@
     $d_info = $d_dashboard->dashboardInfo();
     $nav[$d_key] = [
         'title' => $d_info['title'],
-        'icon'  => $d_info['icon'] ?? $d_key,
+        'icon'  => $d_info['icon'] ?? 'dashboards/'.$d_key,
     ];
 }