Fix sorting

Replace outdated jquery-sortable.js with a modern alternative (sortable.js)
with better flexibility and support for mobile devices

Author: sankam-nikolya

CHANGELOG.md

@@ -1,9 +1,13 @@
 Yii2 multiple input change log
 ==============================
 
-2.28.0 (in development)
+2.29.0 (in development)
 =======================
 
+2.28.0
+=======================
+- replace outdated jquery-sortable.js with a modern alternative (sortable.js) (sankam-nikolya)
+
 2.27.0
 ======
 - #367 (fix) ajax validation doesn't work for newly added/cloned inputs

src/assets/MultipleInputSortableAsset.php

@@ -25,7 +25,7 @@ public function init()
         $this->sourcePath = __DIR__ . '/src/';
 
         $this->js = [
-            YII_DEBUG ? 'js/jquery-sortable.js' : 'js/jquery-sortable.min.js'
+            YII_DEBUG ? 'js/sortable.js' : 'js/sortable.min.js'
         ];
 
         $this->css = [