Update vehicle heading from possible item change

Add support for incomplete segment visuals

When a child item is current show the parent as selected

Support move item to previous item position

Active ROI indication in Plan Map items

Cancel ROI support plus many big fixes

More takeoff item fixes

Fix gimbal yaw visual problems

Fix for vehicle based home position management

New user model for Takeoff item

Fix incorrect usage of _settingsItem causing crashes

More work on contextual Plan tools

A contextual Land/RTL tool. Better waypoint line calc.

More work getting _addMissionSetting right

Fix handling of _addMissionSettings

Support for new TakeoffMissionItem and Takeoff Tool 

Fix save state checks. Show overlay on New.

Remove unused variable

Wizard Mode for Create Plan

New Create Plan support

More work on mission item indicators

Fix SplitSegment insertion

Allow split of current segment

Remove unnecessary signaling

Use QmlObjectListModel::begin/endReset to keep Qt from blowing it's brains out with too many updates

Remove testing ifdef

Directions arrows in Fly View

Fix initial load for Plan view

Fix missing waypointLinesChanged signal. Remove unnecessary directionArrowChanged signal.

More work on direction arrows

Structure Scan turns on Survey photo mode

Use correct QT_TRANSLATE_NOOP to prevent crash

Support for new AltitudeFactTextField

Expose complex item names in a way useful for custom builds