[BUGFIX] Render fieldControl in UuidElement

The 'uuid' FormEngine TCA element misses the call
to render registered field controls. Add it and
merge it into rendered HTML.

Resolves: #101740
Related: #101703
Related: #100171
Releases: main, 12.4
Change-Id: I18983883d2ae4460929a40aa3ccee1a7c261ab63
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80656


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/backend/Classes/Form/Element/UuidElement.php

@@ -104,6 +104,10 @@ class UuidElement extends AbstractFormElement
             $resultArray['javaScriptModules'][] = JavaScriptModuleInstruction::create('@typo3/backend/copy-to-clipboard.js');
         }
 
+        $fieldControlResult = $this->renderFieldControl();
+        $fieldControlHtml = $fieldControlResult['html'];
+        $resultArray = $this->mergeChildReturnIntoExistingResult($resultArray, $fieldControlResult, false);
+
         $html = [];
         $html[] = $this->renderLabel($fieldId);
         $html[] = '<div class="formengine-field-item t3js-formengine-field-item">';
@@ -113,6 +117,15 @@ class UuidElement extends AbstractFormElement
         $html[] =             '<div class="form-wizards-element">';
         $html[] =                 $uuidElement;
         $html[] =             '</div>';
+
+        if (!empty($fieldControlHtml)) {
+            $html[] =      '<div class="form-wizards-items-aside form-wizards-items-aside--field-control">';
+            $html[] =          '<div class="btn-group">';
+            $html[] =              $fieldControlHtml;
+            $html[] =          '</div>';
+            $html[] =      '</div>';
+        }
+
         $html[] =         '</div>';
         $html[] =     '</div>';
         $html[] = '</div>';