Move kdirstat from Utilities to Utilities->File menu.

kdirstat/kdirstat.desktop

@@ -16,3 +16,4 @@ GenericName=Directory Statistics
 GenericName[de]=Verzeichnisstatistik
 GenericName[hu]=könyvtárstatisztika
 MimeType=inode/directory
+Categories=Qt;TDE;Utility;X-TDE-Utilities-File;