Just a helpful suggestion for copying. Open the file you want to copy. Click File->Save As. Navigate to the folder where you want to save it and click Save. It's a lot quicker. (Please don't reply to this. I'm just trying to help, not debate the veracity of your suggestion.)
That's brilliant, thanks. I came back to make another suggestion and would feel bad if I didn't at least thank you for the suggestion!
It would be useful to see file transfer logs as I've ran into a bug several times where files are not transferred correctly over ftp/sftp and a restart is the only fix. When you add in other legitimate errors which aren't reported (such as permission issues) it can be a little frustrating not knowing if a file has transferred correctly until you alt-tab and refresh your browser!
The transfer bugs include large files not being fully uploaded and losing the ability to create/overwrite remote files even though I can switch to the server view tab and delete files. A restart always works. I know there's an FTP coffeecup client but it's no better a solution than switching to using Sublime alongside Filezilla.