Add distance to home to Vehicle FactGroup

Rework disabling of setup pages

MockLink: Simulate movement of ADSB vehicle

CustomMapItems: Fix object creation

This will make setup pages respond accordingly to armed state
transitions. This will also allow the settings on a page to at least be
visible while they are disabled.

QGCCorePlugin::customMapItems support

Vehicle: Allow send COMMAND_LONG from Qml

Also rename QmlPageInfo to QmlComponentInfo to cover more use cases

Stable merge

New PageView control in instrument panel

Split internet test into separate DNS lookup and connection.

Also plugin'ize intrument panel PageView pages

Fly: Show missions from all vehicles

Stable merge

Fix iOS build break

Intrument Widget alternate control: Fix broken settings dialog display

Stable: Buffer overrun in UAS.cc

Offline map: Use FlightMap as base

This way:
* GCS location is shown
* It follows same centering semantics of FlightMap
* Note: Vehicle is not shown

Encapsulate Fly view map items into PlanMapItems control