Rainlendar 2.11 Beta 126

* Changes:
- Added sort button to the new manager dialog.
- If reading the event data from the CalDAV server fails Rainlendar tries to do it with a different method.
- Ctrl+Enter accepts and closes the event and task editors.
- All day events were not shown correctly if they were set on the day when DST changed.
- New operating system specific tray icons. The icon can be changed from the skin's settings.
- The recurrency status for tasks and events can be shown in the tooltip.
- Added context menu to the manager's event list.
- New categories for the skins: Pets, Car, Theatre and Music