Trying to upload a file that's too big for Commons, gives no errors or message, and user can only cancel

On trunk if I try to upload a huge image to Commons, after selecting the file, I cannot insert it. All I can do is cancel.

If there is a limit to the file size, there should be a message to the user stating the file is too big and to select a different (smaller) file.

The same file works on 

https://qa2-us.nightly.sakaiproject.org/portal/site/00288d0f-260f-4c8a-8a28-b698231d1f4d
Sakai - 12.0 - QA2 10/16/2017 - Sakai 12.0-QA2 - Server ip-172-31-6-159

File is 3.71MB, 3456x2304