UI to "Accept" or "Decline" events from online calendar invites, and to send email replies
This is for handling meeting invites as a "participant".
Currently if you use Google Calendar synced to GNOME Calendar via Online Accounts, it seems there's no option to respond to event invites - either accepting or declining.
See also issue #331 for the "creation" (organizer) part.
Prior art
Google Calendar looks something like this:
Edited by Jeff Fortin