Add aria-label to dropdown autocomplete without label

app/Template/header/board_selector.php

@@ -1,6 +1,7 @@
 <?= $this->app->component('select-dropdown-autocomplete', array(
     'name' => 'boardId',
     'placeholder' => t('Display another project'),
+    'ariaLabel' => t('Display another project'),
     'items' => $board_selector,
     'redirect' => array(
         'regex' => 'PROJECT_ID',

app/Template/project_user_overview/sidebar.php

@@ -4,6 +4,7 @@
         'items' => $users,
         'defaultValue' => $filter['user_id'],
         'sortByKeys' => true,
+        'ariaLabel' => t('User filters'),
         'redirect' => array(
             'regex' => 'USER_ID',
             'url' => $this->url->to('ProjectUserOverviewController', $this->app->getRouterAction(), array('user_id' => 'USER_ID')),