Remove properties from ConfirmRemovalForm and update it

Which object should be removed needs not to be a part of a form but is
accessible from the url's query string which should be in the action of the
form.

refs #5525

application/forms/Config/ConfirmRemovalForm.php

@@ -12,57 +12,23 @@ use Icinga\Web\Form;
 class ConfirmRemovalForm extends Form
 {
     /**
-     * The value of the target to remove
+     * Initalize this form
-     *
-     * @var string
      */
-    private $removeTarget;
+    public function init()
-
-    /**
-     * The name of the target parameter to remove
-     *
-     * @var string
-     */
-    private $targetName;
-
-    /**
-     * Set the remove target in this field to be a hidden field with $name and value $target
-     *
-     * @param string $name      The name to be set in the hidden field
-     * @param string $target    The value to be set in the hidden field
-     */
-    public function setRemoveTarget($name, $target)
-    {
-        $this->targetName = $name;
-        $this->removeTarget = $target;
-    }
-
-    /**
-     * Create the confirmation form
-     *
-     * @see Form::create()
-     */
-    public function create()
     {
         $this->setName('form_confirm_removal');
-        $this->addElement(
+    }
-            'hidden',
-            $this->targetName,
-            array(
-                'value'     => $this->removeTarget,
-                'required'  => true
-            )
-        );
 
+    /**
+     * @see Form::addSubmitButton()
+     */
+    public function addSubmitButton()
+    {
         $this->addElement(
-            'button',
+            'submit',
             'btn_submit',
             array(
-                'type'      => 'submit',
+                'label' => t('Confirm Removal')
-                'escape'    => false,
-                'value'     => '1',
-                'class'     => 'btn btn-cta btn-common',
-                'label'     => '<i class="icinga-icon-remove"></i> Confirm Removal'
             )
         );
     }