Kalev Lember authored Oct 04, 2018 and Kalev Lember committed Oct 04, 2018

Only trigger autoupdates once a day, and avoid accidentally triggering
them when a plugin emits updates-changed. Otherwise it can unexpectedly
happen that a user installs an app, which triggers updates-changed,
which in turn triggers autoupdates immediately.

Worse, a plugin might emit updates-changed when it ran into a failure,
which causes autoupdates to trigger, which in turn runs into another
failure, which causes updates-changed, and so on.

Instead, make sure autoupdates only get triggered once per day.