Navigation/DashboardPane: Properly register dashlets as children

refs #3542

library/Icinga/Application/Modules/Module.php

@@ -314,9 +314,12 @@ class Module
         $navigation = new Navigation();
         foreach ($panes as $pane) {
             /** @var DashboardContainer $pane */
-            $dashlets = array();
+            $dashlets = [];
             foreach ($pane->getDashlets() as $dashletName => $dashletUrl) {
-                $dashlets[$this->translate($dashletName)] = $dashletUrl;
+                $dashlets[$dashletName] = [
+                    'label' => $this->translate($dashletName),
+                    'url'   => $dashletUrl
+                ];
             }
 
             $navigation->addItem(
@@ -326,7 +329,7 @@ class Module
                     array(
                         'label'     => $this->translate($pane->getName()),
                         'type'      => 'dashboard-pane',
-                        'dashlets'  => $dashlets
+                        'children'  => $dashlets
                     )
                 )
             );

library/Icinga/Web/Navigation/DashboardPane.php

@@ -62,19 +62,6 @@ class DashboardPane extends NavigationItem
         $this->setUrl(Url::fromPath('dashboard', array('pane' => $this->getName())));
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function merge(NavigationItem $item)
-    {
-        parent::merge($item);
-
-        $this->setDashlets(array_merge(
-            $this->getDashlets(false),
-            $item->getDashlets(false)
-        ));
-    }
-
     /**
      * Set disabled state for pane
      *

library/Icinga/Web/Widget/Dashboard.php

@@ -77,8 +77,8 @@ class Dashboard extends AbstractWidget
         foreach ($navigation as $dashboardPane) {
             /** @var DashboardPane $dashboardPane */
             $pane = new Pane($dashboardPane->getLabel());
-            foreach ($dashboardPane->getDashlets(false) as $title => $url) {
+            foreach ($dashboardPane->getChildren() as $dashlet) {
-                $pane->addDashlet($title, $url);
+                $pane->addDashlet($dashlet->getLabel(), $dashlet->getUrl());
             }
 
             $panes[] = $pane;