Set sync priority on a per-folder basis

This thread should possibly be refiled under troubleshooting. The problems we see with odrive not detecting modified files without manual intervention makes odrive useless as a collaboration tool in our environment.

Edit to above. After 5 days, two Windows machines running odrive v5391 have not picked up a changed file. Odrive only syncs to a single encrypted folder containing one file on each of these computers. The share on one computer is hosted on Box, the other uses Google Drive. The native clients synced the changes within seconds of the files being modified.