Add explicit comment for nonce creation without action parameter

Author: vytisbulkevicius

classes/Visualizer/Render/Page/Types.php

@@ -39,6 +39,7 @@ class Visualizer_Render_Page_Types extends Visualizer_Render_Page {
 	 */
 	protected function _toHTML() {
 		echo '<form method="post" id="viz-types-form">';
+			// Using wp_create_nonce() without action parameter to match verification in Chart.php
 			echo '<input type="hidden" name="nonce" value="', wp_create_nonce(), '">';
 			parent::_toHTML();
 		echo '</form>';