Visual indicator when sync fails
Whenever something like #554 (closed) happens the user has no way to tell that something went wrong. The software is not showing any sign of malfunction and the only way to notice there is an issue is to run from a terminal or an IDE, or to go to GNOME Logs and hunt down the error message, but one wouldn’t go and do that unless they know it’s not working.
There should be an indicator in the interface that tells the user when Fractal is unable to sync. We probably want to define a threshold as we don’t want to get users worried about an occasional hiccup.