The built-in Syncthing library was updated to 2.1.6. So be sure to read about the major changes in 2.1 on https://github.com/syncthing/syncthing/releases/tag/v2.1.6 if you are using the built-in Syncthing library.
syncthingtray-2.1.8-x86_64-pc-linux-gnu.tar.xz was reuploaded to fix the dashboard which was completely broken in the initial build.
Full Changelog: https://github.com/Martchus/syncthingtray/compare/v2.1.7...v2.1.8
