Display Progress when Scanning

As a user with many files, whenever a scan is performed, there is no information about how far the scan has progressed; therefore, I wish to have an indicator in the Folder List when status is Scanning to understand the current progress.

Suggestion: instead of just “Scanning”, display with a percentage, e.g. “Scanning 16%”, to indicate that currently 16% of files are scanned, where 16% is the scanned file count over total file count in that folder, e.g. 16 files scanned out of 100 files under that folder.

Please see https://forum.syncthing.net/t/scanning-progress-not-shown/7363.

We don’t really know the file count until we’ve looked through the files, and at that point we do show a percentage.