Fix: add dashboard icon

css/dashboard.css

-.toolbar-icon-dashboard:before {
-  background-image: url(../images/dashboard.svg);
-}
-
-.toolbar .toolbar-menu-administration-dashboard.item-list ul li {
-  margin: 0;
+.toolbar-bar .toolbar-item.toolbar-menu-administration-dashboard:before {
+  background-image:url("../images/dashboard.svg");
 }
 
 @keyframes pulse-throbber {

dashboards.module

@@ -57,10 +57,21 @@ function dashboards_toolbar() {
       'tags' => [
         'config:dashboard_list',
       ],
+      'contexts' => [
+        'user.permissions',
+      ],
     ],
   ];
 
-  $boards = \Drupal::entityManager()->getStorage('dashboard')->loadMultiple();
+  $entityTypeManager = \Drupal::entityTypeManager();
+
+  $boards = $entityTypeManager->getStorage('dashboard')->loadMultiple();
+  foreach ($boards as $key => $board) {
+    if (!$board->access('view', \Drupal::currentUser())) {
+      unset($boards[$key]);
+    }
+  }
+  $boards = array_values($boards);
   $links = [];
   foreach ($boards as $board) {
     $link = $board->toLink($board->label())->toRenderable();
@@ -74,7 +85,7 @@ function dashboards_toolbar() {
       '#title' => t('Dashboards'),
       '#url' => Url::fromRoute('<current>'),
       '#attributes' => [
-        'class' => ['toolbar-icon-dashboard'],
+        'class' => ['toolbar-icon', 'toolbar-menu-administration-dashboard'],
       ],
     ],
     'tray' => [
@@ -86,9 +97,6 @@ function dashboards_toolbar() {
           'class' => ['toolbar-menu'],
         ],
         '#items' => $links,
-        '#wrapper_attributes' => [
-          'class' => ['toolbar-menu-administration-dashboard'],
-        ],
       ],
     ],
     '#weight' => 150,