Improve in / out of focus transitions: Added a function which detects if the yaw value changed significant while in focus state. This event is typically pointing to a arm movment => diver is no longer focussing at the OSTC. Improve custom view mapping: Added a direction indicator to the focus distance value (now +/- values instead of absolut values before). With this modification custom view sectors may have the double size and are threrfore easier to be controlled.