each time you transfer files to remote ftp server, and your wifi goes down. You are informed the transfer failed. 

You have two options here: Cancel that broken file or abort process completely.

There should be a retry button here so I could continue transfer successfully after fixing connection, write permissions or anything.

Reproducible: Always

Steps to Reproduce:
1. Start transfer of multiple files to ftp server
2. disable wifi
3. see window with the message of broken transfer
4. turn your wifi back on
4. note how you cannot retry
Actual Results:  
you're not able to retry transfer

Expected Results:  
you should be able to retry the file and continue

please just add retry button here. people have to upload whole directory structure again if they just continued transfer and haven't noted the file that needs to be uploaded later.