Progress bar on upload attachments

Hello everyone,

there is a mod to get a progress bar when uploading attachments?

I set osTicket so as to allow attachment of up to 30 Kb, but the lack of the "progress bar" makes this feature unusable.

Also when I try to attach files in addition to 10-12 Mb appears the following error:

CGI Error

The specified CGI application misbehaved by not returning a complete set of HTTP headers.

I hope someone can help you.

Thanks in advance.