Add disabled property and implement the functionality

refs #6986

library/Icinga/Web/Widget/Dashboard/Component.php

@@ -42,6 +42,13 @@ class Component extends AbstractWidget
      */
     private $pane;
 
+    /**
+     * The disabled option is used to "delete" default dashlets provided by modules
+     *
+     * @var bool
+     */
+    private $disabled = false;
+
     /**
      * The template string used for rendering this widget
      *
@@ -117,6 +124,26 @@ EOD;
         return $this;
     }
 
+    /**
+     * Set the disabled property
+     *
+     * @param boolean $disabled
+     */
+    public function setDisabled($disabled)
+    {
+        $this->disabled = $disabled;
+    }
+
+    /**
+     * Get the disabled property
+     *
+     * @return boolean
+     */
+    public function getDisabled()
+    {
+        return $this->disabled;
+    }
+
     /**
      * Return this component's structure as array
      *
@@ -136,6 +163,10 @@ EOD;
      */
     public function render()
     {
+        if ($this->disabled === true) {
+            return '';
+        }
+
         $view = $this->view();
         $url = clone($this->url);
         $url->setParam('view', 'compact');