Add support for Photo save path

VTOL Takeof/Landing Pattern work

Shorten meta data keys for smaller file sizes

Support for Vehicle and Firmware classes

Remove AutoLoad support

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

Cut over to new JSON translation system

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

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