Fix upload_form file inputs in firefox
Fix upload_form file inputs in firefox

Selecting a file creates a new file input, but in firefox that new
input will contains the same files as the one that was cloned so when
the user hit upload the file will be uploaded twice.

This does not affect chromium.

Signed-off-by: Florian Pritz <753f544d2d01592750fb4bd29251b78abcfc8ecd@xinu.at>

jreinert/filebin,jreinert/filebin,jreinert/filebin,Bluewind/filebin,Bluewind/filebin,Bluewind/filebin,Bluewind/filebin,jreinert/filebin,Bluewind/filebin,jreinert/filebin,jreinert/filebin