fixed Edit Form for field enum with value = '0'

SE/se-lib/UI.php

@@ -654,7 +654,7 @@ class UI {
 				foreach ($values as $val => $label) {
 					$html->childrens[] = [ 'option', array_merge(
 						[ 'value' => $val ],
-						(!empty($selValue) && $selValue == $val) ? [ 'selected' => "selected" ] : []
+						((!empty($selValue) || '0' === $selValue) && (string)$selValue === (string)$val) ? [ 'selected' => "selected" ] : []
 					), $label ];
 				}
 			} break;