Synchronise Gnote notes over Google Drive

I've seen reports that it's not possible to synchronise Gnote notes, for the flatpak version of the application, using Google Drive. When saving the Online Folder preferences the following error is displayed:

Error connecting

volume doesn't implement mount

The fix requires adding two, documented and safe, flatpak permissions. This is achieved easily using the Flatseal application as follows:

• Under the Gnote Filesystem|Other files settings category click the folder with + button and add this new entry:

  xdg-run/gvfsd

• Under the Gnote Session Bus|Talks settings category click the + button and add this new entry:

  org.gtk.vfs.*

After adding these permissions, the saving of Gnote's Online Folder Synchronisation setttings should result in a successful connection being reported. Notes may now be synchronised using the shared notes folder.