Comment 13 for bug 1615364

Since a picture says more than a thousand words, I'm attaching a screenshot of an image upload that I programmed somewhere else. It has a "Rename Image:" field where the user can change the filename to something else during upload. We would have 2 such fields, one for the map name, and 1 for the file name, ideally prefilled from the map file that the user is trying to upload. This way, the user won't have to rename the map file on hard disk before the upload.

The filename field could have some explanatory text as to which characters are legal, plus we do an automatic cleanup in any case to be safe.