New VehicleLinkManager implementation

Clean up references to MainRootWindow globals

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

Telemetry Values bar at center bottom

Move GuidedActionsController references to global

Cherry pick virtual joystick fix from Stable

ToolStrip rearchitecture for encapsulation and customization

Re-architect toolbar for better customization capabilities. Also use less real estate.

Rework Fly View into separate layers which can be customized at each layer.