Refactor enqueueFileTransfer#420

proski wants to merge 1 commit intoDeterminateSystems:filetransfer-enqueue-exceptionsDeterminateSystems/nix-src:filetransfer-enqueue-exceptionsfrom

proski:refactor-enqueueFileTransferproski/nix-src:refactor-enqueueFileTransferCopy head branch name to clipboard