Always do a new line for each uploaded file, when uploading multiple files
Slack discussion: https://gitlab.slack.com/archives/frontend/p1487715098019308
Apparently this is what already should be happening with the code at dropzone_input.js
Proposal
Always do a new line for each uploaded file, when uploading multiple files
cc: @rspeicher @DouweM @lbennett @alfredo1