In bug "[ 898745 ] Wrong result for folders
(non-recursive compare)" I removed result/status from
folders appearing both sided. Because it was always
"Files are different".
I think it would be nice to see subfolders status though.
But there are some caveats:
1) Scanning subfolders makes compare slower
2) Scanning one level of folders may produce confusing
results, if there are differences deep in folder
structure. And scanning whole directory structure would
be same as recursive scan - just display current folder.
3) Rescan only current folder or also subfolders?
One solution could be "blocking" scan of current folder
and then background scanning of subfolders.