FilterEditor: allow additional parameter control

We may want to keep additional parameters in our url and ignore other
ones when the filter changes

library/Icinga/Web/Widget/FilterEditor.php

@@ -24,6 +24,12 @@ class FilterEditor extends AbstractWidget
 
     protected $query;
 
+    protected $url;
+
+    protected $preserveParams = array();
+
+    protected $ignoreParams = array();
+
     /**
      * @var string
      */
@@ -76,6 +82,18 @@ public function setQuery($query)
         return $this;
     }
 
+    public function ignoreParams()
+    {
+        $this->ignoreParams = func_get_args();
+        return $this;
+    }
+
+    public function preserveParams()
+    {
+        $this->preserveParams = func_get_args();
+        return $this;
+    }
+
     protected function select($name, $list, $selected, $attributes = null)
     {
         $view = $this->view();