add nested menu dropdown

Author: pxpm

src/app/View/Components/NestedMenuDropdown.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Backpack\CRUD\app\View\Components;
+
+use Closure;
+use Illuminate\Contracts\View\View;
+use Illuminate\View\Component;
+
+class NestedMenuDropdown extends MenuDropdown
+{
+    /**
+     * Get the view / contents that represent the component.
+     */
+    public function render(): View|Closure|string
+    {
+        return backpack_view('components.nested-menu-dropdown');
+    }
+}

src/resources/views/ui/components/nested-menu-dropdown.blade.php

@@ -0,0 +1,15 @@
+<li class="nav-item dropdown">
+    <a {{ $attributes->merge([
+            'class' => 'nav-link dropdown-toggle',
+            'href' => $link ?? '#',
+            'data-bs-toggle' => 'dropdown',
+            'role' => 'button',
+            'aria-expanded' => 'true'
+        ]) }}>
+        @if($icon)<i class="nav-icon {{ $icon }} d-block d-lg-none d-xl-block"></i>@endif
+        @if($title)<span>{{ $title }}</span>@endif
+    </a>
+    <div class="dropdown-menu {{ $open ? 'show' : '' }}" data-bs-popper="static">
+    {!! $slot !!}
+    </div>
+</li>