Remove altitude mode warning which was causing recursion into dialog display and view switch problems

Cut over to new JSON translation system

Cherry pick virtual joystick fix from Stable

Updated mavlink forwarding implementation to forward all mavlink messages received on all channels onto a single UDP port. A new mavlink forwarding UDP link is created if forwarding is enabled. The mavlink settings page now has a Fact checkbox for enabling forwarding and a fact text field for specifying the host name.

Modified support for multiple first run pages. Added first run for offline vehicle settings.

Add support for Json file string translations

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