Applying some minor adjustments

Author: eduard13

app/code/Magento/Widget/Block/Adminhtml/Widget/Options.php

@@ -166,7 +166,7 @@ protected function _addField($parameter)
 
         if (is_array($data['value'])) {
             foreach ($data['value'] as &$value) {
-                if (!is_array($value)) {
+                if (is_string($value)) {
                     $value = html_entity_decode($value);
                 }
             }

lib/internal/Magento/Framework/Data/Form/Element/Label.php

@@ -37,7 +37,7 @@ public function __construct(
     public function getElementHtml()
     {
         $html = $this->getBold() ? '<div class="control-value special">' : '<div class="control-value">';
-        if (!is_array($this->getValue())) {
+        if (is_string($this->getValue())) {
             $html .= $this->getEscapedValue();
         }