Auto Alarm: Accepted Meetings

Better alarms when you travel across time zones. Events without a time zone (such as all-day events) now ring at local time where you are, and show a warning mark in the timeline and notification list plus a note on the event details screen. Fixed snoozed reminders disappearing, muted events ringing again, deleted events still ringing, and notifications not firing after switching calendar systems, all after a time zone change. Fixed meetings accepted in iOS Calendar not ringing because of an unanswered copy of the invite in another account, mute being lost after changing the app language, and a rare crash. Also fixed dates shown twice in the notification list and improved the remaining-time text in reminders.