Trails 2.0

• Trails (not settings) are stored in the logbook instead of preferences. This means that the logbook must be stored after upgrading to save the trails. When detecting old preferences, the settings and trails are backed up to a separate file. It is possible to explicitly save/restore settings/trails to a backup file with Alt-x result list shortcut and Shift-Alt-x result list shortcut.

Many tweaks and bug fixes