Display calendar in group view even on small screens
At the moment the calendar is not displayed in the mobile view of a group.
Maybe we could show it below the group summary, if there are announced events (i.e. the group actively uses the calendar). It could be hidden, if no future events are known.
User experience example: one user recently reported, that only old events are visible. He just misinterpreted the blog area (containing previous event announcements) and could not see the calendar with future events on his mobile device.