- Compatibility fix for 3rd party add-ons which replace an expected ArrayCollection object with an array.
- When summarizing alerts hopefully reduce the chance of deadlocking, and if it happens gracefully recover
- Fix AdminCP User edit setting 'alerts page skips mark read' to the same value as 'alerts pop-up page skips mark read'
- Fix "Group alerts" option to group by day, and not per-minute
- Use phrase groups for 'yesterday/today' phrases to avoid extra SQL queries
- Add options icon
- Cleanup XF2.1 support
- Add XF1-style 'star' to unread/new alerts
- Add visual seperator between read & unread alerts in alerts pop-up when "Display unread alerts above read alerts in pop-up" is enabled
- Fix "Unknown Accessed unknown getter 'title' on XF:ReportComment" from report comment reaction/like summaries
- For install, remove old XF1 grouped alerts to avoid errors about unknown templates
- php 7.4 compatibility update (Requires XF v2.1.3)