MAGETWO-86576: 11828 Fix issue with swatch colour block not showing in admin...

MAGETWO-86576: 11828 Fix issue with swatch colour block not showing in admin panel once colour selected (PHP7.1.x issue). #13101

app/code/Magento/Swatches/Block/Adminhtml/Attribute/Edit/Options/Visual.php

@@ -84,15 +84,15 @@ class Visual extends AbstractSwatch
      * Parse swatch labels for template
      *
      * @codeCoverageIgnore
-     * @param null $swatchStoreValue
-     * @return string
+     * @param null|array $swatchStoreValue
+     * @return null|array
      */
     protected function reformatSwatchLabels($swatchStoreValue = null)
     {
         if ($swatchStoreValue === null) {
             return;
         }
-        $newSwatch = '';
+        $newSwatch = [];
         foreach ($swatchStoreValue as $key => $value) {
             if ($value[0] == '#') {
                 $newSwatch[$key] = 'background: '.$value;