Changed all calls to View::render() in views to use absolute path within module

Maximises compatibility with view overrides, preventing "View not Found – yii\base\ViewNotFoundException" errors when a view is overridden that contains a call to `View::render()` and a relative path was specified

src/User/resources/views/shared/admin_layout.php

@@ -32,7 +32,7 @@ use yii\helpers\Html;
                 <h3 class="panel-title"><?= Html::encode($this->title) ?></h3>
             </div>
             <div class="panel-body">
-                <?= $this->render('_menu') ?>
+                <?= $this->render('/shared/_menu') ?>
                 <?= $content ?>
             </div>
         </div>

src/User/resources/views/shared/message.php

@@ -20,7 +20,7 @@ $this->title = $title;
 ?>
 
 <?= $this->render(
-    '_alert',
+    '/shared/_alert',
     [
         'module' => $module,
     ]