Заметки в уведомлениях

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Snooze feature added. Now it's possible to snooze repeating notes without changing their schedules. Other types of notes can also be quickly postponed.
Other details:
- Snooze for some duration or until a suggested time directly from the notification; or pick custom time
- Modify suggested snooze times
- Added warning when deleting a repeating note in edit mode
- Minor fixes