title: Limit file upload size across multiple files
body: <p>I'm using jQuery file upload <a href="https://github.com/blueimp/jQuery-File-Upload/wiki/Options" rel="nofollow">https://github.com/blueimp/jQuery-File-Upload/wiki/Options</a></p>
  
  <p>I would like to set a maximum file size that applies to the file size of all attachments combined. In other words if the max limit is 10mb then the user can upload as many files as they wish, but the combined size of them all cannot exceed 10mb.</p>
  
  <p>I see in the documentation I can set this constraint on a single file, but not all of them combined. Any ideas on how I can accomplish this?</p>