Rainlendar 2.10 Beta 119

- Some of the scripts got broken by the Lua 5.2 update.
- The relative snooze to the target time wasn't updated correctly to the alarm window.
- Added Rainlendar_Backup and Rainlendar_Restore to the Lua API. Backup can be done with a hotkey too.
- Rainlendar_DeleteComponent() deletes also the subtasks automatically. Same also happens if the task is deleted from the manager.
- The start and end times are updated in the event/task editor now also if the time is entered manually.
- If downloading the Google calendar fails because the authentication was expired Rainlendar will reauthenticate automatically.
- Improved the error handling when importing events fails.
- Yearly recurring events were not always shown on leap years.
- Dragging a task in the schedule views did not work correctly.