Resize progress bar when terminal window is resized

[xcfmc]

Minor cosmetic issue... the progress bar doesn't shrink to fit when you make the terminal window smaller during compression. It line wraps, scrolls, and draws lots of lines instead of updating the one progress line.

[mhx]

Heh, I know. :)

Ideally, I'd like to migrate the whole progress code to something like superconsole. It's quite low on my list of priorities, though. I'll see if I can do a quick hack to fix the issue in the meantime.

[xcfmc]

Yeah, I felt bad mentioning that one O:-) No rush.

[mhx]

I've pushed a fix. It's not pretty, and it still messes up the output if you resize, but at least it continues to update properly after the resize is done.