Apply padding-top|botttom to fieldset via qfq-fieldset class.

extension/Source/core/AbstractBuildForm.php

@@ -3809,6 +3809,7 @@ abstract class AbstractBuildForm {
         $attribute .= Support::doAttribute('id', $formElement[FE_HTML_ID]);
         $attribute .= Support::doAttribute('name', $htmlFormElementName);
         $attribute .= Support::doAttribute('data-load', ($formElement[FE_DYNAMIC_UPDATE] === 'yes') ? 'data-load' : '');
+        $attribute .= Support::doAttribute('class', 'qfq-fieldset');
         $attribute .= Support::doAttribute(ATTRIBUTE_DATA_REFERENCE, $formElement[FE_DATA_REFERENCE]);
 
         // <fieldset>

less/qfq-bs.css.less

@@ -121,6 +121,11 @@ select.qfq-locked:invalid {
   width: auto;
 }
 
+.qfq-fieldset {
+  padding-top: 5px;
+  padding-bottom: 15px;
+}
+
 
 .qfq-form-pill {
   /*