Logging: Display upload / download file size in file transfer messages

[Hou5e]

Mentioned on Folding Forum
FAH v7 shows the data transfer size, and FAH v8 doesn't yet:

Example:
FAH v7: 08:58:08:WU00:FS00:Downloading 22.07MiB
FAH v7: 11:01:16:WU00:FS00:Uploading 22.93MiB to 206.223.170.146

FAH v8: 06:14:18:I1:/RG2:WU23:Downloading WU
06:14:18:I1:OUT6:> POST https://fah1.innovatr.ca/api/assign HTTP/1.1
06:14:18:I3:Connecting to fah1.innovatr.ca:443
06:14:46:I1:OUT6:< fah1.innovatr.ca:443 HTTP/1.1 200 HTTP_OK
06:14:47:I1:/RG2:WU23:Received WU

FAH v8: 11:09:51:I1:/RG2:WU23:Uploading WU results
11:09:51:I1:/RG2:WU23:Uploading WU results
11:09:53:I1:OUT13:> POST https://fah1.innovatr.ca/api/results HTTP/1.1
11:09:53:I3:Connecting to fah1.innovatr.ca:443
11:20:15:I1:OUT13:< fah1.innovatr.ca:443 HTTP/1.1 200 HTTP_OK
11:20:15:I1:/RG2:WU23:Credited

Similar to Issue #71

[jcoffland]

Size is now displayed in the progress updates. These don't show yet on Windows/macOS.