Image uploads: EXIF coordinate data no longer saved

[jnga]

While investigating #694, found that during image uploads, EXIF coordinate data is still being extracted but is no longer being saved with the uploaded image. It does appear this was working in the past. It is not clear why it is no longer working. If saving these data cannot be made to work on the server side again, perhaps try a client-side approach. According to the code history, this may have been tried at some point.