Comment 0 for bug 2072574

Impact
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Calendar notifications currently pop up a full app window instead of as a normal notification.

The normal notifications respect the Do Not Disturb setting, but the full app window does not.

Test Case
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From Ubuntu Desktop…
Add your Google account to GNOME Settings > Online Accounts.
Add a calendar event to Google Calendar with a notification in advance.
When it is time for the notification, you should see a GNOME Shell notification. You can click on the notification to see the full Reminders window.

What Could Go Wrong
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The ubuntu-settings package is shipped by default with Ubuntu Desktop, Ubuntu Unity, and Edubuntu. Edubuntu is practically the same as Ubuntu Desktop as far as the desktop experience goes with one additional GNOME Shell extension to sort the Show Apps view alphabetically.

TODO: Test impact on Unity

Other Info
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I believe this override was originally added in 2011 for Unity's benefit LP: #757805
It was also helpful for GNOME in early GNOME 3 days with the unusual messaging tray that was later dropped.

These days, GNOME Shell notifications work well, better than a separate popup window.

If someone wants to keep the existing behavior, they can run this in a terminal:

gsettings set org.gnome.evolution-data-server.calendar notify-with-tray false