[BUGFIX] Fix missing closing divs in SelectSingleBoxElement

Under certain conditions closing divs were missing:

1. When all fieldControls are disabled.
2. If the field itself is disabled.

This fixes these cases, so we have correct html at all times.

Resolves: #94535
Releases: master, 10.4
Change-Id: Ieb7670666b6a927e80eb7377770d7f54189bc093
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69808
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>

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

@@ -139,8 +139,8 @@ public function render()
                 $html[] =       '<div class="form-wizards-items-aside">';
                 $html[] =           $fieldControlHtml;
                 $html[] =       '</div>';
-                $html[] =   '</div>';
             }
+            $html[] = '</div>'; // Close form-wizards-aside
             $html[] =   '<p>';
             $html[] =       '<em>' . htmlspecialchars($languageService->sL('LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:labels.holdDownCTRL')) . '</em>';
             $html[] =   '</p>';
@@ -149,6 +149,8 @@ public function render()
                 $html[] = $fieldWizardHtml;
                 $html[] = '</div>';
             }
+        } else {
+            $html[] = '</div>'; // Close form-wizards-aside
         }
         $html[] =   '</div>';
         $html[] = '</div>';