More takeoff item fixes

Better wordings for Takeoff item

Better wordings for Takeoff item

PLan: Takeoff item user model changes

Fix for vehicle based home position management

Remove unused code

Fix incorrect usage of _settingsItem causing crashes

New user model for Takeoff item

Fix gradient calc

Fix incorrect usage of _settingsItem causing crashes

ArduPilot: Group parameters with no metadata correctly

ADSB server support

Group parameters with no metadata with the other existing params in the group, not in "Other"

Error display

Update

Fix reference to settings from wrong thread

ADSB server support provided through new ADSBVehicleManager implemenation

Plan: More work on contextual Plan tools

QGCMapPolygon: Fix center drag and split side

More work on contextual Plan tools

APMHeliComponent - update for Copter 4.0

Plan: Land tool

Advanced tuning hidden due to crash from Qt problem

Fix center drag and split side

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

RTL is no longer part of Mission Settings

Update for non bug reports

Update

Plan creator: Fix insertion of takeoff item

Advanced tuning hidden due to crash from Qt problem

ParameterManager, ParameterEditorController: Nice category & groups for components

Fix takeoff item insertion in plan creators

Only show split indicator on mission layer