(cherry picked from commit 2faa80dacfa726f1ece6720934e5b5f81ca4b754)

* Use correct key names

* Rewrite FTPManager

* Fix Reset Session at end of download

* Fixes for metadata download

* Remove unneeded mutex

* Cleanup LinkInterface, fix connect/disconnect bug

* Clang 12: Fix Autopilotplugin compile warning

* Clang 12: Fix Vehicle CompInfo compile errors

New VehicleLinkManager implementation

Co-authored-by: Don Gagne <dongagne@outlook.com>

Add esc_status to vehicle fact group

Use {n} for indexed param tagging

Changed parameter name regex support to something that works

Refactor/fixes for ProximityRadar and friends

Support 'FOO<#>_BAR` param name metadata

Clean up references to MainRootWindow globals

Move fact groups out of Vehicle to separate source files

Full BATTERY_STATUS support

Move UAVCAN config to Vehicle

Move calibration methods to Vehicle

- add NOTIFY for distanceSensor property
- add DistanceSensorReadingsChange() callback prototype

- revert excessive NOTIFY
- adding MaxSensor into DistanceSensor frame handling

- add proximity radar view in map view
- add proximity radar view in video view

change distance label positioning in video view

clean up unwanted comments

- space up proximity sectors
- revert unwanted changes in qgroundcontrol.qrc

squashed commits

Unified photo/video control which works with mavlink cameras and just video stream

Move Vibration to Analyze

Press and Hold on Arm will change it to Force Arm

More flight mode, vtol mode, armed into main status

Ready To Fly support based on MAV_SYS_STATUS_PREARM_CHECK

Fix C++ 20 compiler warning

Support null for FactMetaData default

Shorten meta data keys for smaller file sizes

Replace qFuzzyCompare with better functioning QGC::fuzzyCompare

Remove buggy usage of vehicleYawsToNextWaypointInMission

Prefer ALTITUDE message over GPS messages

Support for Vehicle and Firmware classes

Comp Info support for http downloads

Remove support for RC_CHANNEL_RAW. Was causing problems with incorrect channel counts.