Allow submitting multiple files

[pdawyndt]

trafficstars

Here's an example of using the ace editor with multiple tabs. Could be used as an extension of Dodona submissions with multiple files (for example an html, css and js file for HTML5 assignments).

Original issue by @pdawyndt on Wed Sep 27 2017 at 18:40.

[chvp]

(also?) allow direct files upload

Original comment by @charvp on Wed Oct 31 2018 at 14:31.