test use sections

app/UI/Client/Setting/Sections/AdditionalSection.php

@@ -24,7 +24,9 @@ class AdditionalSection extends FreeFieldsSection
 
     public function initContent()
     {
-        $this->generateDoubleSection([new Switcher('dkimsigenabled')]);
+        $dkimsigenabled = new Switcher('dkimsigenabled');
+        $dkimsigenabled->addHtmlAttribute('readonly', true);
+        $this->generateDoubleSection([$dkimsigenabled]);
         $this->generateDoubleSection([new Switcher('tfaenabled')]);
 
     }