Fixed WysiwygWidget with proper altering of text_format element

Closes #3466381

src/Plugin/UiPatterns/Source/WysiwygWidget.php

@@ -40,6 +40,9 @@ class WysiwygWidget extends SourcePluginBase implements TrustedCallbackInterface
    *   Processed element
    */
   public static function textFormat(array $element) : array {
+    if (!isset($element['#ui_patterns']) || !$element['#ui_patterns']) {
+      return $element;
+    }
     if (isset($element['format']['format']['#access']) &&
       !$element['format']['format']['#access']) {
       // See code at Drupal\filter\Element\TextFormat::processTextFormat()
@@ -87,9 +90,7 @@ class WysiwygWidget extends SourcePluginBase implements TrustedCallbackInterface
     $value = $this->getSetting('value');
     $element = [
       '#type' => 'text_format',
-      '#pre_render' => [
-        [static::class, 'textFormat'],
-      ],
+      '#ui_patterns' => TRUE,
     ];
     if (is_array($value) && array_key_exists("value", $value)) {
       $element['#default_value'] = $value['value'];