Always generate AppSettings::savePath at runtime for mobile builds

Temporary use setting for using CONDITION_GATE in Patterns

Plan: Add support for takeoff item required

Change default to on

The VideoReceiver should work 'as is', without depending on the
whole application or in the settings. This patch removes all the
hard dependencies on QGroundControl, FactSystem and Settings system
so it's easier to isolate and test the code.

Persist MissisonItemStatus visibility

Support Keep map centered on vehicle

Fix VTOL value

Warn about Above Terrain usage

ADSB server support provided through new ADSBVehicleManager implemenation

Add setting to show Presets tab first

delete unused code

Plugin'ized follow me support

Disable video workaround for gstreamer crashes

Configurable Go To Location max distance

- NorthUp becomes NoseUp and is disable by default
- Changes on SVG to make them with the same diameter as the CompassDiag
- Change the order of the indicator layouts

- Remove HomeHeading / COG / HeadingToNext
- Add setting AdditionalIndicatorsCompass that group the previous
  settings

- Add setting for Heading to Next WP and Nort Up lock
- Add check for vehicle for every indicator to avoid showig them while
  no vehicle

By default the Instrument Panel is the one from master,
It can be switched to alternate version by a checkbox in General Settings/Fly View