PR changes we applied:

- reduced text info in search results
- injection of dependency was changed to optional (backward compatibility)
- highlighting of found field
- defined vertical size of results list

Author: maximgubar

app/code/Magento/Backend/Model/Search/Config.php

@@ -69,10 +69,10 @@ public function findInStructure(ElementIterator $structureElementIterator, $need
             if (!($structureElement instanceof ElementInterface)) {
                 continue;
             }
-            $elementPathLabel = $pathLabel . '/' . $structureElement->getLabel();
             if (stripos((string)$structureElement->getLabel(), $needle) !== false) {
-                $this->resultBuilder->add($structureElement, $elementPathLabel);
+                $this->resultBuilder->add($structureElement, $pathLabel);
             }
+            $elementPathLabel = $pathLabel . '/' . $structureElement->getLabel();
             if ($structureElement instanceof AbstractComposite && $structureElement->hasChildren()) {
                 $this->findInStructure($structureElement->getChildren(), $needle, $elementPathLabel);
             }

app/code/Magento/Backend/Model/Search/Config/Result/Builder.php

@@ -88,7 +88,7 @@ public function add(ElementInterface $structureElement, $elementPathLabel)
 
         $this->results[] = [
             'id'          => md5($structureElement->getPath()),
-            'type'        => __('Config'),
+            'type'        => null,
             'name'        => $structureElement->getLabel(),
             'description' => $elementPathLabel,
             'url'         => $this->urlBuilder->getUrl('*/system_config/edit', $urlParams),

app/code/Magento/Config/Block/System/Config/Edit.php

@@ -11,6 +11,9 @@
  */
 namespace Magento\Config\Block\System\Config;
 
+use \Magento\Framework\App\ObjectManager;
+use \Magento\Framework\Serialize\Serializer\Json;
+
 /**
  * @api
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
@@ -48,17 +51,17 @@ class Edit extends \Magento\Backend\Block\Widget
     /**
      * @param \Magento\Backend\Block\Template\Context $context
      * @param \Magento\Config\Model\Config\Structure $configStructure
-     * @param \Magento\Framework\Serialize\Serializer\Json $jsonSerializer
      * @param array $data
+     * @param Json|null $jsonSerializer
      */
     public function __construct(
         \Magento\Backend\Block\Template\Context $context,
         \Magento\Config\Model\Config\Structure $configStructure,
-        \Magento\Framework\Serialize\Serializer\Json $jsonSerializer,
-        array $data = []
+        array $data = [],
+        Json $jsonSerializer = null
     ) {
         $this->_configStructure = $configStructure;
-        $this->jsonSerializer = $jsonSerializer;
+        $this->jsonSerializer = $jsonSerializer ?: ObjectManager::getInstance()->get(Json::class);
         parent::__construct($context, $data);
     }
 

app/code/Magento/Config/view/adminhtml/templates/system/config/edit.phtml

@@ -17,6 +17,11 @@
  *  getConfigSearchParamsJson() - string
  */
 ?>
+<style>
+    .highlighted {
+        background-color: rgb(255, 255, 153)!important;
+    }
+</style>
 <form action="<?= /* @escapeNotVerified */ $block->getSaveUrl() ?>" method="post" id="config-edit-form" enctype="multipart/form-data">
     <?= $block->getBlockHtml('formkey') ?>
     <div class="accordion">
@@ -31,7 +36,8 @@ require([
     "mage/mage",
     "prototype",
     "mage/adminhtml/form",
-    "domReady!"
+    "domReady!",
+    "jquery/ui"
 ], function(jQuery, registry){
 
     var adminSystemConfig = {
@@ -59,6 +65,10 @@ require([
             if ((typeof group !== 'undefined') && (typeof field !== 'undefined')) {
                 var fieldElement = jQuery('#' + section + '_' + group + '_' + field);
                 fieldElement.focus();
+                fieldElement.addClass('highlighted');
+                setTimeout(function() {
+                    fieldElement.removeClass('highlighted', 2000, "easeInBack");
+                }, 3000);
             }
         },
         getUp: function (element, tag) {

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/header/actions-group/_search.less

@@ -80,6 +80,8 @@
         box-shadow: @component__box-shadow__base;
         left: 0;
         margin-top: -2px;
+        max-height: 80vh;
+        overflow: auto;
         padding: 0;
         position: absolute;
         right: 0;