fix iconv bug while processing non-utf8 folders

Author: albertcht

src/traits/LfmHelpers.php

@@ -298,7 +298,7 @@ private function removeLastSlash($path)
     public function translateFromUtf8($input)
     {
         if ($this->isRunningOnWindows()) {
-            $input = iconv('UTF-8', 'BIG5', $input);
+            $input = iconv('UTF-8', mb_detect_encoding($input), $input);
         }
 
         return $input;
@@ -313,7 +313,7 @@ public function translateFromUtf8($input)
     public function translateToUtf8($input)
     {
         if ($this->isRunningOnWindows()) {
-            $input = iconv('BIG5', 'UTF-8', $input);
+            $input = iconv(mb_detect_encoding($input), 'UTF-8', $input);
         }
 
         return $input;