ADSB server support provided through new ADSBVehicleManager implemenation

Support for new TakeoffMissionItem and Takeoff Tool 

Integrate Create Plan overlay in File DropPanel

New Create Plan support

ArduPIlot Follow Me setup

Better flight trajectory point algorithm

Disable pairing

Disable Pairing code on Android 64 bit builds

New qml base log replay status bar

Automated the generation of language resources into the application
Added all languages that come from Crowdin, even if empty.
Allow dynamic language changes

Error message indicates Qt 5.12 is required but in reality, it's 5.11. Android CI will need to be updated as it is still using 5.9.

Switch to using firmware manifest for ArduPilot flashing

Rework ArduPilot Airfame setup page

Adjust fly overlay height
Change minimum Qt version to 5.11+

Offline Maps: Allow custom build settings overrides

TODO: Improve the experience

Add QGC_DISABLE_INSTALLER_SETUP to CONFIG will override config in QGCInstaller.pri.
However, QGCInstaller.pri can be imported in the custom one. In this way
a custom build can generate it's own installer config or add pre and post steps.

ArduPilot for configurable mavlink stream rates

On desktop (Ethernet connection), the ground unit pushes UDP directly, which makes the use of an actual "Link" not possible. Instead, I've moved all of Taisync support to a "manager" owned by QGCToolbox.
Added a Taisync settings with some basics already wired and running.