IT: OTS (China)

Reassigned from Bruce to Van

Output(2023/06/25)

1. Add a backdrop (grey loading overlay) to prevent the Save button from being clicked again when uploading a file.
   Especially in network environments where uploading files is slow.
2. Add a versioning mechanism for js code so that users can reload it without pressing ctrl+f5 (without using cache).

protected\views\layouts\desktop.php
ui\desktop\js\order.plugin.js