Allow first-level menu items without children to have blank target (#254)

Author: loic425

src/BootstrapAdminUi/templates/shared/crud/common/sidebar/menu/menu.html.twig

@@ -27,6 +27,8 @@
         {%- set classes = classes|merge([options.lastClass]) %}
     {%- endif %}
 
+    {%- set target = item.linkAttributes and item.linkAttributes['target'] ? item.linkAttributes['target'] : '_self' %}
+
     {% set is_active = matcher.isCurrent(item) or matcher.isAncestor(item, options.matchingDepth) or item.getExtra('always_open') %}
 
     {# Mark item as "leaf" (no children) or as "branch" (has children that are displayed) #}
@@ -60,12 +62,12 @@
         </li>
     {% else %}
         <li class="nav-item">
-            <a class="nav-link" href="{{ item.uri }}">
+            <a class="nav-link" href="{{ item.uri }}" target="{{ target }}">
                 <span class="nav-link-icon d-md-none d-lg-inline-block">
                     {{ block('icon') }}
                 </span>
                 <span class="nav-link-title">
-                    {{ item.label|trans }}
+                    {{ item.label|trans }} {% if target == '_blank' %}{{ ux_icon('tabler:external-link', {'class': 'icon icon-sm ms-1 mb-2 opacity-75'}) }}{% endif %}
                 </span>
             </a>
         </li>