Reuploading folder with existing files #102
Description
If something happens during folder upload (like page refresh) - user starts to upload the same folder to continue - existing files are reuploaded.
Expected: resume not yet uploaded files, for all the others - ask if the user would like to replace or resume/skip (check size and reupload if differs?)
It'd be also nice if the files not yet uploaded, but able to resume - could be resumed not only by using the same folder upload, but also entering the folder and putting the missing file to upload.
