possibility to work on already uploaded files

[hpvd]

Sometimes several files are already uploaded, but before doing a next step, one notice something is wrong with them - what should one do? one can not to the next step.

example:
you want to give some photos of your holiday to a photo printing shop.
This shop has implemented awesome uppy uploader.
So you load up 20+ Fotos.
During uplaod of files you have some time...
while some photos are still uploading you notice that one of the photos already uploaded are completely wrong (it shows...xxx)

=> What should one do?
One do not want to do the next step in shop (order)

One can not delete the false photo.
One can not add a comment (via edit) "please do not print"

Would be good to give a possibility within uppy to do the same things to already uploaded files than to files with upload not started.

Maybe by sending a request to external?
Or by reuploading a new copy of the file with changes made?

actions:

• edit files:
  -- change file name (e.g. correct spelling...)
  -- add comment (if function is available)
  -- ...
• delete file (partly discussed in give the user the feeling of control over his data -and possibility to also have it #63)
• exchange file? (e.g. upload a new file which inherit/succeed: filename, already input comment...)

[arturi]

Added to backlog, thank you!